The ultimate physicist's dilemma! This person was watching a pool table with a grid overlay (clearly for physics calculations) when their mom walked in. Rather than trying to explain they were studying elastic collisions, conservation of momentum, and vector analysis in a billiards simulation, they switched to something... less scientific. It's the reverse of the classic "I swear I'm watching this for the physics" excuse. Turns out explaining coefficient of restitution, friction forces, and angular momentum calculations is more suspicious than the alternative! That's when you know you've reached peak nerd status - when your actual scientific interests seem more questionable than pretending to watch inappropriate content.