VROOM with sparks is a bad sign!

yesterday i witnessed a friend of mine fall off his motorcycle while driving it about 20 mph. yup, i was in the parking lot of church and he was showing us his NEW honda.... vroom and slide off the bike, i saw sparks, he tumbled about 5 feet, scratched up body and scratched up his new bike. he didn't have his helmet on which scared me to death.... but the scariest part of all.... i can't get the images out of my head. it gives me the chills every time i think about it. i can't image this happening on the freeway! how do you get crazy images like this horrid thing out of your mind and get back to thinking motorcycles are ok? do you ever get over things like this or will it forever be engrained on my mind? will two wheeled vehicles other than bicycles be banned for life? help me from being the anti-biker!