Double 2010 Moto2 winner Andrea Iannone snatched his fifth pole position of the season by just 0.041sec from Scott Redding on the final lap of Aragon qualifying.
Redding and Alex de Angelis, both involved in Shoya Tomizawa's fatal accident at Misano, put the mental anguish behind them as they battled for pole in the closing stages of the session.
The pair exchanged the top spot with five minutes to go, with Redding staying on top right until Iannone's 17th and final lap.
For Marc VDS rider Redding it was his third front row start in succession, while de Angelis - making his second appearance for JiR - was only 0-.046sec from pole for his second ever Moto2 front row.
Title leader Toni Elias, winner of the last four races and 83 points clear of Julian Simon in the championship, had a tough session - falling at turn one with 15 minutes to go. The Spaniard was unhurt but could face some form of sanction for riding the wrong way down pit lane to get back to the Gresini pits as soon as possible.
Elias soon dropped outside the top ten as others improved and although he returned to the track he could only manage twelfth on the grid, albeit only 0.690sec from pole. Simon will start from the outside of the front row in fourth for Aspar Suter.
Elias' temporary team-mate and World Supersport regular Michele Pirro made an impact in his first Moto2 qualifying by claiming eighth position.
Spanish-based Scot Kev Coghlan, who finished 22nd on his Moto2 debut at Silverstone, had been an excellent second fastest after the Aragon free practice sessions and qualified just ahead of Elias in twelfth.
Qualifying - Aragon:
1. Iannone (Speed Up) 1m 55.148s
2. Redding (Suter) +0.041s
3. de Angelis (MotoBI) +0.046s
4. Simon (Suter) +0.216s
5. Corsi (Motobi) +0.351s
6. Corti (Suter) +0.437s
7. Talmacsi (Speed Up) +0.479s
8. Pirro (Moriwaki) +0.604s
9. Bradl (Suter) +0.604s
10. de Rosa (Tech 3) +0.646s
13. Coghlan (FTR) +0.711s