Brad Keselowski inherited victory in the NASCAR Cup Series race at Bristol as leaders Joey Logano and Chase Elliott took each other out with two laps to go.
After a caution period instigated by long-time leader Denny Hamlin spinning on tyre marbles ended with five laps of a scheduled 500 to run, Elliott's Hendrick Motorsports Chevrolet Camaro led Logano's Penske Ford Mustang.
However 2018 Cup champion Logano nipped ahead of Elliott using the higher line and was holding onto his position when Elliott charged up the inside and got loose, taking both cars into the wall.
The race stayed green to the finish as the combatants limped to the line at the in 21st (Logano) and 22nd (Elliott), at the tail end of the lead lap.
That allowed Logano's Penske team-mate Keselowski to take full advantage and score his second victory of the season, following his Charlotte 600-mile success last Sunday.
By dint of pitting under a caution on lap 459, Keselowski had the freshest tyres of the leading pack in the closing stages, his rivals having not stopped since lap 434.
The 2012 Cup champion's #2 Mustang, which had started on pole in a random draw, eased past Kyle Busch on the final restart to be in position to benefit when Logano and Elliott (pictured below) clashed.
Using a similar strategy, Stewart-Haas Racing's Clint Bowyer kept clear of the trouble late on to finish second, his best result of the season thus far.
Jimmie Johnson's winless run now stands at 104 races, but the seven-time champion also posted his best result of the campaign in third, after being disqualified from second in last week's Coca-Cola 600.
Having started from 24th, Johnson's Hendrick Chevrolet quickly rose to ninth after the first competition caution on lap 20 and was running with the leading gaggle for a majority of the afternoon.
Johnson was involved with Joe Gibbs Racing pair Hamlin and Kyle Busch when the two Toyota Camry's were trading the lead through the 250-lap final stage.
After Hamlin's spin which relegated him to an eventual 17th, Johnson too passed Busch, who was the lead Toyota finisher in fourth.
JGR team-mate Erik Jones was a strong fifth as Austin Dillon followed an eighth place at the second Charlotte race on Thursday with sixth for Richard Childress Racing.
Kurt Busch (Chip Ganassi Racing Chevrolet), William Byron (Hendrick), rookie Christopher Bell (Leavine Family Racing Toyota) and Bubba Wallace Jr. (Richard Petty Motorsports Ford) completed the top 10, as contact between Jones and SHR driver Kevin Harvick ended the latter's run of 13 consecutive top 10 finishes.
The 2014 champion's #4 Mustang could only recover to 11th.
In a race of high attrition and 17 caution periods, there was one red flag when Ricky Stenhouse Jr got loose following Matt Kenseth's Ganassi machine and spun into the pit-wall.
As Stenhouse came back onto the track, he collected Cole Custer, Tyler Reddick and Alex Bowman, who were all eliminated in the melee.
Result - 500 laps
|1||Brad Keselowski||Team Penske||Ford||3h19m02.s|
|2||Clint Bowyer||Stewart-Haas Racing||Ford||0.471s|
|3||Jimmie Johnson||Hendrick Motorsports||Chevrolet||0.906s|
|4||Kyle Busch||Joe Gibbs Racing||Toyota||1.333s|
|5||Erik Jones||Joe Gibbs Racing||Toyota||1.585s|
|6||Austin Dillon||Richard Childress Racing||Chevrolet||1.731s|
|7||Kurt Busch||Chip Ganassi Racing||Chevrolet||1.955s|
|8||William Byron||Hendrick Motorsports||Chevrolet||2.104s|
|9||Christopher Bell||Leavine Family Racing||Toyota||2.316s|
|10||Darrell Wallace Jr.||Richard Petty Motorsports||Chevrolet||3.072s|
|11||Kevin Harvick||Stewart-Haas Racing||Ford||3.106s|
|12||Ryan Preece||JTG Daugherty Racing||Chevrolet||3.571s|
|13||John Hunter Nemechek||Front Row Motorsports||Ford||3.657s|
|14||Michael McDowell||Front Row Motorsports||Ford||3.718s|
|15||Ryan Newman||Roush Fenway Racing||Ford||4.009s|
|16||Matt Kenseth||Chip Ganassi Racing||Chevrolet||4.056s|
|17||Denny Hamlin||Joe Gibbs Racing||Toyota||4.144s|
|18||Daniel Suarez||Gaunt Brothers Racing||Toyota||4.621s|
|19||Timmy Hill||MBM Motorsports||Toyota||4.835s|
|20||Martin Truex Jr.||Joe Gibbs Racing||Toyota||6.299s|
|21||Joey Logano||Team Penske||Ford||16.181s|
|22||Chase Elliott||Hendrick Motorsports||Chevrolet||22.262s|
|23||Chris Buescher||Roush Fenway Racing||Ford||4 Laps|
|24||Brennan Poole||Premium Motorsports||Chevrolet||6 Laps|
|25||J.J. Yeley||Tommy Baldwin Racing||Chevrolet||8 Laps|
|26||Garrett Smithley||Spire Motorsports||Chevrolet||11 Laps|
|27||Quin Houff||StarCom Racing||Chevrolet||17 Laps|
|28||B.J. McLeod||BJ McLeod Motorsports||Chevrolet||Accident|
|29||Aric Almirola||Stewart-Haas Racing||Ford||Accident|
|30||Gray Gaulding||Rick Ware Racing||Ford||Accident|
|31||Matt DiBenedetto||Wood Brothers Racing||Ford||44 Laps|
|32||Corey LaJoie||Go FAS Racing||Ford||Fuel pressure|
|33||Joey Gase||Petty Ware Racing||Chevrolet||Too slow|
|34||Ricky Stenhouse Jr.||JTG Daugherty Racing||Chevrolet||Accident|
|35||Cole Custer||Stewart-Haas Racing||Ford||Accident|
|36||Tyler Reddick||Richard Childress Racing||Chevrolet||Accident|
|37||Alex Bowman||Hendrick Motorsports||Chevrolet||Accident|
|38||Bayley Currey||Rick Ware Racing||Chevrolet||Accident|
|39||Ty Dillon||Germain Racing||Chevrolet||Accident|
|40||Ryan Blaney||Team Penske||Ford||Accident|