How do you conquer your fears?

You live in a high rise condominium, and one day are having fun with friends by sailing paper airplanes out the window to watch as they fly all the way to the ground. Problem is, one of your paper airplanes seems to distract a pedestrian, who doesn't notice an oncoming car and is hit and run over. You watch, horrified, as an ambulance carries the victim away with lights and siren on. You later find out that your good-looking single neighbor on your same floor was the one hit by the car, breaking his leg. Do you keep it a secret, knowing that your friends know you were the cause of the accident? Or do you go to your neighbor in the hospital? What will you do and say?