[Boone isn't so great with explosives, really. He knows how to use a grenade but as far as most explosives go he's pretty clueless. He shakes his head and puts his ear to the side of the can.]

It's... hissing.

[He holds the can back out to Niko. Nuka Cola may be irradiated but it sure as hell doesn't hiss at anyone trying to drink it.]