Any penalty here.

[Niner]

So.......a fat guy falls on an opponent and won't spring up, it's a foul? You didn't mention "holding him down" just reclining on him.

[ajmc]

Originally Posted by Niner

So.......a fat guy falls on an opponent and won't spring up, it's a foul? You didn't mention "holding him down" just reclining on him.

Skinny guys can improperly impede an opponent also. The answer to your question is totally dependent on what YOU see.

If you believe that what you are looking at is a player, "Use(ing) his hands, arms or legs to hook, lock, clamp, grasp, encircle or hold in an effort to restrain an opponent." (NF:9-2-1c or 3c) and it provides an unfair advantage to the player initiating the action, you have a foul. If you don't think that's the case, or there isn't any unfair advantage being gained, it's likely not a foul.

That's a judgment YOU have to make based on what YOU see.