I picked up 3 of these lights today from walmart. I thought they would be a nice gift for my dad and grandpa for fathers day since they were cheap and come with batteries. I opened mine in the car and it worked fine. When I gave the one to my grandpa we put the batteries in and it wouldn't work! I tapped the top of the flashlight against my hand a few times and got it working but it crapped out again. I thought this was really weird. just the other day my grandpa was telling me how everything he has ever bought from walmart either didn't work or didn't last very long and then out of all the 3 flashlights he gets the one that didn't work. is this just my bad luck? I read a few posts about these lights and people say there reasonably durable. anyone else had this happen? maybe it was bad from the factory. i dont see how it could of been damage in shipping unless it got smacked really hard.