if you actually look at the replay, it seems as though Laimbeer got tangled up by his own player and he was really off balance and had to kinda lean on bird for support who was also off-balance from the type of shot he was taking, and in effect - it looks like Bird got the worst of it (but he didn't cause he was alright enough to start fighting)...
That was on an over the back call on Parrish where Lambier just kept bodying him out. I was at that game. It was less a hard foul than a punch by Parish. It'd almost be like calling Kermit Washington's punch a hard foul.
when i read "hard foul" i think of in game situations-- not a fight scenario like the rudy t- kermit punch