[Asriel feels it too. The pain subsides only slightly, but it feels harder to hold himself together. His voice turns a little higher, if only he's afraid of what's going to happen next.

His eye's travel to Mettaton's SOUL, and there's a tense look on his face for a moment before he turns back to Mettaton and pretend he saw nothing.]

If... if this turns me back into a flower.

... I want you to kill me. Or at the very least, lock me in here so I can't get out.

[Would locking him up even work? Flowey had Determination, and can just reset... but maybe with some luck, this was his last SAVE point.]