Ah, the ol' throw the grenade in the air, have it fall down a chimney, and kill a guy standing near the fireplace trick.
Hey Vladimir, check out the sky today. Isn't it beautiful and devoid of sharp, falling objects? I could stare up defenselessly at it forever.
Could you detonate that C4 a little lower on my back? I've got this itch that I can't quite reach.
"Hey, this grenade looks familiar."
This guy gets it.