FFS he's hiding his middle finger, nothing more.
This is the RC car racing park. They race RC cars here. That's what the center elevated area is. Racers stand up there with their controllers.
And whoever keeps calling this a roller derby rink is an idiot. No one roller derbies on concrete.
Don't tell me it's not an RC racing park ffs. I've been competing there for the past 4 years, damn near every weekend.