Apparently the car alarm would have went off. Which is odd to set the alarm while inside..
Oh, right, I forgot about that part. But that doesn't make any sense either, why would a car's alarm go off if it was opened from the inside...?
I guess to alert a parent if their child is attempting to leave the vehicle
Or maybe if someone broke the window and reached in to open the lock?
yet another prime example of socially handicapped misfit kids on blockland loving up at doing a menial task in real life