[Sadly, analyzing neuron signals does not take up so much processing power that Accelerator has to shut down his other senses, so he does indeed hear that laugh. It's irritating, and he tries to ignore it as he finishes, flicking his choker switch back to normal mode and removing his hand.

Then he sees that grin and he really has to resist the rising urge to punch Endo in the face.]

Shut up.

[That's coming out in a low growl. On a good day he isn't a touchy person, so all of this kind of sucks.]

Your internal organs haven't suffered any major damage. And....

[His hand doesn't fully drop. Instead, Accelerator moves his fingers down to Endo's shoulder, and abruptly digs his nails into his skin, hard enough until he's drawing blood. It's necessary, though he can't really deny feeling a hint of satisfaction as he does it. It isn't quite a punch, but it's better than nothing.

Switching his choker back to esper mode, more data floods into his brain. This lasts only a few seconds before he switches back again and pulls his hand away. He continues what he was saying:]

You're not gonna bleed out.

[Being able to read the flow of a person's blood is useful when assessing injuries. The only downside is he needs to be touching their blood directly. Could he have given a warning or asked for permission? Absolutely. Did he want to? Nope.

He sits back on his knees, his assessment all done. It's mostly good news: from what he gathered via blood flow and Endo's nervous system his biggest injury is a broken arm. He's for sure going to have some big bruises and his ribs probably need to be looked at by a doctor but no organs were punctured.]

You're really fucking lucky. You still need a hospital, but you're not about to die in the next five minutes.