For some reason or another the side markers (not sure if that's what they're called) on my headlights go in and out. If i hit a bump or something of that nature they just flick off, the same can happen and they can flick back on. I can literally get out of my car and give my headlight a little love tap with the side of my fist and they'll flick right back on when they're out. I haven't had a chance to really look at it but i'm thinking it's something along the lines of a loose wire (hopefully). Has this occurred to anyone else?!

 

maybe either the bulb is not sitting tightly in the socket or something is wrong with the socket