[Unfazed by that frosty reception, he gives her a shrewd look over. She looks tall and powerful, so if anyone could help with his little experiment, it'd be someone of her build and stature. But since she's in a bad mood...]

All right, then let me rephrase. Have you ever been so mad you just wanna throw stuff, get it all out of your system?

[He offers her the rock, and then quickly adds,] Uh, but not at me or anyone in here, though! Just throw it up.

[Do it for science, his expression seems to say. Doitdoitdoit.]