some ridiculous rule where if you both make the middle cup you remove the cup and every cup it's touching. it can remove up to 6 cups if done on the first turn and it's the easiest cup to make in the first place.
i'm pretty sure they use the rule at beach hut deli tournaments. i vow to never participate in those due to the douchebaggery in attendance. also by the time i'm 21 beer pong will be ridiculously dated.
it jumped the shark right around when my age group got introduced to it (HS class of 2008). it's in rap songs, there's t shirts at jcpennys for it, ping pong balls are now sold right on the beer aisle, and the fact that every time i go to foodsco and buy beer the old ladies always say "playing beer pong tonight i see
" are making me start to hate everything about it. but it's a really solid party game that brings together total strangers.