I was sitting on one end of the lawn and someone was driving a van all over the grass. The driver shouted across the field to ask if I could see what his headlights were pointed towards (it was daytime). It was supposedly some kind of trap that would hit you in the face with a swinging tennis ball when you tried to grab it. It wasn’t long before I saw another one right above my head but it went off without any input. A girl who was supposedly the creator of these devices rode past me on a kiddy bike as I ducked to dodge the tennis ball. “Fuck you!” I shouted at her but then quickly tried to apologize before I was cut off by a similar response. The back wheels of her bike started twisting and deforming as she rode away.