Most people do not get stuck at all.
To demonstrate how difficult it is to describe what you are asking for can you please describe what it is like to stuff a dildo up your front hole?
A quick and dumb question, is it firm like an apple, soft like a peach or firm with give like an orange? Sorry for all the fruit but its prob the best reference for feel I can think of. Cheers !
I've never got stuck before but only because I'm scared to.
Usually it feels like a pressure more than anything. When he's large enough for me to feel that I usually bump forward so it stays out.
I've always wanted to knot with a dog, but I'm scared to do it alone because if it gets big enough for it to get stuck...I don't want to feel it either rip out from force or have myself get hurt from it.
don't worry, there is nothing scary about the knot entering your pussy, it will grow and at first you will feel pain, but then the pleasure will conquer you and you will feel how good it is