It's bad to push a small kid.
Dave is at the mall window shopping when he feels a small child, Gary  leaning on him while he's staring at the shop window.
Dave wants to get Gary off him.
Dave taps Gary on the shoulder to get his attention then asks him to please get off his leg.
Dave shoves Gary quite hard and Gary goes flying away from Dave, landing on his butt and hurting himself.
Gary realizes that he's leaning on Dave and says a sheepish sorry before running back behind his mom.
Gary starts to cry loud and hard right away as the whole mall looks at Dave with bewilderment and anger.