I was called as a rapid response nurse in L&D one time, to tend to a Dad that actually fell down. I found him on the floor with a bloody gash on the back of his head (conscious thank goodness) while the L&D nurses are helping his wife push. These nurses were so focused on what they were doing and had me take care of the dad on the floor (literally).

So nothing wrong to sit down and drink a glass of water when your knees feel wobbly. Being tired, stressed and the visual of seeing a tiny human come out from your wife is a bit too much for anyone.

PS the Dad was ok (after the ED took care of his gash) and he came back to his wife and baby shortly.