Headscratchers / Mike and Dave Need Wedding Dates

• During the video montage of Mike and Dave ruining family events (mainly weddings), why is Mike being held culpable for the incident at Cousin Rachel's Wedding for whacking that girl? Why was that idiot even sitting on the roof in the first place? She put her own safety at risk, not Mike.
  • The trampoline was probably their idea, so they get blamed.