Below is an example of my luck;
I mountain bike my local trails (Woodville, NS / The links) for 2 years with nothing more then a flat tire or two. Come the first race day at said local trails (enduro), I take a corner after a screaming fast run, no doubt a contender for top the spots in my class. And guess what happens....
I have 1 non-serious fall and destroy my rear brake lever, tear the hose out of and bend my front brake lever, and if that wasn't enough I flatted a tire. Well, that was a day ender for sure..... Yep, thats my luck in nutshell, a big fat DNF