Is it physically possible to binge after long fast(28 days)

What are the complications of 1 day binging after a long water fast(28 days)?

I'm on day 10 and I was going to do a 28 day Water Fast but on the 29th day I have to go to a buffet to celebrate someone's birthday. What would happen if I binge on that day only? Would I physically be able to do it? I don't really care about the weight gain. I just don't want to die.

If it's not possible, I think I'll just do a 21 day.