Heh. I don't think that will happen. It would smeg off a lot of fans. Beside, the stasis booths aren't based on cryogenic suspension. The latter literally freezes you preserving your body until you are revived later. The stasis booths work by creating a kind of field that time cannot penetrate. (In effect, one works by preventing the passage of time affecting you. The other affectively stops time for you.) Dave didn't go to sleep. If I understand correctly, from his point of view, he stepped in, then a few seconds later (i.e the time taken for the field to be activated then deactivated) stepped out. When he said to Holly "But I just stepped in there" (or words to that effect) he wasn't mistaken as from his POV that's what happened.