I saw a clip years ago where a mother jumps in the ring and hits her sons opponent in the head with a shoe.
I saw it again about 2 months ago on FOX Best Damn Sports Show Period.
I did not catch the names of the fighters.

I guess we can also mention Zab Judah taking a glove to referee Jay Nady's throat after Zab was put on queer street against Kostya Tszyu.