Originally Posted by
MaryGoRound 
Except that person falling off the bike is me and its just a really painful memory that plays over and over.
I try to reason with myself when I start obsessing over past events. I try to tell myself that there is nothing I can do about it now - it's in the past - allow myself to feel whatever I'm feeling for a bit - and then when it starts to overwhelm me and starts plying on loop I try to distract myself (until I'm better able to deal with the pain, hurt, or whatever other negative feeling) as KP has already pointed out.
At times it works, other times it doesn't (and I end up posting here or talk these feelings out with someone else to get rid of them - get myself help).