Lewis Hamilton repeated his morning performance to set the fastest time again in second practice for the Hungarian Grand Prix, in a session disrupted by a heavy rain shower.
The dry running was compressed into the first half of the afternoon, as although the rain was relatively brief and the temperatures remained hot, the track received too heavy a soaking for slicks to be viable thereafter.
Conditions had been hot and sunny at the start of the session, but with rain looming on the radar, teams hurried to get on track, leading to a busy start. Kimi Raikkonen was fastest for a spell in his Lotus, before the Ferraris moved ahead - Felipe Massa slightly quicker than Fernando Alonso.
The rain-conscious frontrunners then switched to the soft tyres shortly after the half-hour mark, leading to a busy period in which Jenson Button (McLaren), Alonso and then Raikkonen swapped the top spot between them.
Hamilton had to abandon one quick lap when he came across Charles Pic's Marussia in the final sector, but just before the rain began, he was able to show his speed with a 1m21.995s.
That put him 0.185 seconds clear of Raikkonen, while Bruno Senna thrust his Williams into third place, ahead of the Ferraris and Button.
Behind seventh and eighth-placed Paul di Resta (Force India) and Sebastian Vettel (Red Bull), the top 10 was completed by two drivers who met the barriers during the afternoon. Romain Grosjean had an early incident when he ran wide on the exit of the chicane and spun back across the track, taking the front wing off his Lotus on the inside barrier. He was able to get back to the pits and quickly rejoin under repairs.
Michael Schumacher was less fortunate. For the second Friday in succession, he crashed in the wet, locking up on intermediate tyres and sliding straight on into the tyres at the Turn 11 right-hander at the end of the penultimate straight.
The Mercedes driver's incident was a warning to the other drivers who were getting some wet mileage, but it did not deter many of the field from coming out on intermediates in the final half-hour, as much of the circuit dried completely while other sections remained sodden..
Pos Driver Team Time Laps 1. Lewis Hamilton McLaren-Mercedes 1m21.995 20 2. Kimi Raikkonen Lotus-Renault 1m22.180s + 0.185 20 3. Bruno Senna Williams-Renault 1m22.253s + 0.258 33 4. Felipe Massa Ferrari 1m22.417s + 0.422 28 5. Fernando Alonso Ferrari 1m22.582s + 0.587 22 6. Jenson Button McLaren-Mercedes 1m22.747s + 0.752 17 7. Paul di Resta Force India-Mercedes 1m22.794s + 0.799 23 8. Sebastian Vettel Red Bull-Renault 1m22.824s + 0.829 18 9. Romain Grosjean Lotus-Renault 1m22.922s + 0.927 12 10. Michael Schumacher Mercedes 1m23.160s + 1.165 19 11. Nico Rosberg Mercedes 1m23.164s + 1.169 28 12. Pastor Maldonado Williams-Renault 1m23.337s + 1.342 26 13. Nico Hulkenberg Force India-Mercedes 1m23.713s + 1.718 25 14. Mark Webber Red Bull-Renault 1m23.814s + 1.819 17 15. Kamui Kobayashi Sauber-Ferrari 1m23.841s + 1.846 28 16. Jean-Eric Vergne Toro Rosso-Ferrari 1m24.328s + 2.333 23 17. Daniel Ricciardo Toro Rosso-Ferrari 1m24.345s + 2.350 27 18. Sergio Perez Sauber-Ferrari 1m24.623s + 2.628 22 19. Vitaly Petrov Caterham-Renault 1m24.823s + 2.828 28 20. Heikki Kovalainen Caterham-Renault 1m25.220s + 3.225 28 21. Timo Glock Marussia-Cosworth 1m27.104s + 5.109 27 22. Pedro de la Rosa HRT-Cosworth 1m27.106s + 5.111 18 23. Charles Pic Marussia-Cosworth 1m27.185s + 5.190 22 24. Narain Karthikeyan HRT-Cosworth 1m27.822s + 5.827 20 All Timing Unofficial