In the culmination of their prank war, Susan slaps Sharon in the face after the latter ruins her party dress. Sharon replies with an equally vicious slap and the two get into a brawl.
The Lindsay Lohan version
The fencing scene.
What Hallie and Annie do to Meredith on the camping trip. Everything.
After being floated out into the middle of the lake on the air mattress, Meredith delivers an ultimatum to Nick: it's either her or the girls. His response? "Them." When she asks him what he said, he says, "T-H-E-M. Them. Get the picture?"