Only once. DM had a circular dungeon. We started a fight and got split and a couple PC's fled the fight deeper into the dungeon.

Some out of game drama leaked into the game and one player sprinted their character through the whole dungeon, brining all the enemies together behind him as he looped back around.

It was a shits and giggles evil campaign, we weren't, super attached to our characters, so we kicked that player out and started a new campaign.