Just watching him reviewing his demo on stream he seems nervous as fuck throughout the entire thing, I haven't watched the demo with models on like Muffin suggested but that is definitely a good way to see if someone fucks up and accidentally scopes or looks where they shouldn't.

From playing against him he has definitely done some sketchy kills on me, a few times I completely walked the opposite site while my team planted at the other and he still randomly turned around and scoped in where I was coming from even though I made absolutely no noise.

Compared to some of the sketchy shit others do on the server, Bird is definitely lower on the list though.