I almost got myself in a car accident.?

As a teenager, I almost swiped a motorcycle in the left lane lane near an intersection. I was in the right and there was a right turn lane to my right with a big rig making a turn. It made me nervous, so I went into the left lane. I didn't see the motorcycle and he had to slam on his brakes. I didn't mean it, but he must have thought I did, because he chased me down and asked if I thought it was funny. I didn't know what else to do, so I just gave him a thumbs up. I was an inexperienced driver. He was an ***. I'm glad there was no accident.