Dear Ackerman, Why was RSL able to beat DC United?

maybe it was because we were tired of winning, ever think of that? i mean come on, you can only dominate so long before it gets boring. or maybe it was because RSL plays on the WORST athletic field in the known universe. seriously it's barely astro turf, it is like the green stuff underneath the fruits and vegetables in the grocery store. how can any self respecting soccer team be expected to know how to play a game meant for grass on worn mormon church carpet?