Full Friday free practice times from the Dutch MotoGP, round six of the 2010 world championship.
Marco Melandri ran straight on at the new, ultra-fast, Ruskenhoek turn after 12 minutes and suffered a big highside when he rejoined the track.
The Italian walked away holding his left arm and is being treated for a 'suspected shoulder dislocation'. He is 'doubtful' for qualifying.
Ducati's Nicky Hayden fell in the final minutes, but was unhurt.
Hiroshi Aoyama, injured last Sunday at Silverstone, has been replaced at Interwetten Honda by HRC test rider Kosuke Akiyoshi.
1. Jorge Lorenzo
ESP Fiat Yamaha Team 1m 34.769s
2. Casey Stoner
AUS Ducati Marlboro Team 1m 35.088s
3. Dani Pedrosa
ESP Repsol Honda Team 1m 35.451s
4. Ben Spies
USA Monster Yamaha Tech 3 1m 35.518s
5. Nicky Hayden
USA Ducati Marlboro Team 1m 35.576s
6. Randy de Puniet
FRA LCR Honda MotoGP 1m 35.598s
7. Andrea Dovizioso
ITA Repsol Honda Team 1m 35.626s
8. Aleix Espargaro
ESP Pramac Racing 1m 35.640s
9. Marco Simoncelli
ITA San Carlo Honda Gresini 1m 35.965s
10. Loris Capirossi
ITA Rizla Suzuki MotoGP 1m 36.177s
11. Colin Edwards
USA Monster Yamaha Tech 3 1m 36.224s
12. Marco Melandri
ITA San Carlo Honda Gresini 1m 36.297s
13. Hector Barbera
ESP Paginas Amarillas Aspar 1m 36.388s
14. Mika Kallio
FIN Pramac Racing 1m 36.944s
15. Alvaro Bautista
ESP Rizla Suzuki MotoGP 1m 37.19s
16. Kousuke Akiyoshi
JPN Interwetten Honda MotoGP 1m 39.379s
Fastest Friday time:
ESP Fiat Yamaha 1m 35.169s