He was totally helping out in the battle against the Chitauri. He was just running so fast you couldn't see him. 
[BLACKOUT]Ah, Ultimate Quicksilver. You would have been such a great version of the character had you not been getting it on with your sister.[/BLACKOUT]

[BLACKOUT]Ah, Ultimate Quicksilver. You would have been such a great version of the character had you not been getting it on with your sister.[/BLACKOUT]