JOY BEHAR sure knows how to make an entrance.  On “The View” yesterday, she fell straight on her BUTT while she was walking to her seat.

Her co-hosts Sara HainesSunny Hostin, and Whoopi Goldberg rushed over to help her up.  As she took her seat she said, quote, “Twenty-five years, that has never happened.  Who do I sue?!”

But she also urged people to take falls seriously, given what happened to BOB SAGET.