"Have you heard about the one about stepping on a crack"
"Well I know black cats are bad luck"
"I know for a fact that breaking a mirror will give you 5 whole years of bad luck... most people think it's another number but I know that it's 5."
For the record... I don't believe in any kind of luck (good or bad). Sometimes good things happen and sometimes not so great things happen to you but I'm quite certain that you breaking a mirror isn't a part of it... much like all those times you stepped on a crack and your mom's back was just fine. But I do my best to avoid those crack as a kid... you bet I did!