A flop is when a bunny will sort of launch themselves onto their side from a standing position. When they hit the floor they’re all nicely stretched out on their side.
If a rabbit is very relaxed, they will often lie sprawled out. They will lie on their front and stretch their back legs, paws, and tail out behind them.
Rabbits will quite often tuck their little paws under their body and relax their head, making them look like a little fluffy loaf of bread.