Venomous and poisonous are the same thing, as far as he's concerned. Friendship is a much less mutable category, or at least it is only mutable in one direction.

"Shut up, I'm going, I'm going! It's a matter of principle now!"

Distinctly huffy about having his integrity questioned, Popp follows his dumbass snake fanatic jerk friend out, and considers hovering above the grass before deciding that he should really save his magic in case he needs to Zoom the both of them to the hospital in a hurry. Or in case he needs to fight a huge snake.