"You can have a turn. If you want. I'll grab it out of your hands if it's gonna fall, though." They don't have quite that much faith in (this) him to just toss it over and not worry.

...Friends. Frisk gives him a weird look. "What?"

They have, in fact, seen the Gaster Blasters. Once. When 'their' Sans almost killed himself with his own and it was super glitched up and they were crying and screaming. They don't remember that well, understandably.