Clearly this question deserves an explanation. SO the best one I can give is that these people lack a lot of body control! mAnd they're in an enormous chair.
The videographer in this here video has some suggestions for 2 women who find themselves stuck in an enormous beach chair. Multiple times, between cackling fits, the videographer screams "use your crotch" in order to get out of the seat. Is that how YOU do it?
This video just has Friday written all over it. Enjoy!