Touma brushing off Accelerator's attacks as if they were nothing was pretty damn awesome. As Chaos said, there's more than what meets the eye, I won't be surprised if he solos Fiamma in the next volume... in which according to The Observer will be out on August 10th.
As for Accelerator, it looks like a bad time
to not carry a gun ei?
Also, it seems when he's in Black wings mode he gets frequent headaches or is this the first time? and his earlier encounter with that [worst] clone definitely didn't help. Anyway,I hope he's still the same bad-ass character who knocks on people's doors at night and shoots them point-blank range with a shotgun, and isn't afraid to kill when needed. I'm afraid Touma's influence might change him completely.