And not sure if this has changed since last time I flew, but don't put pressurized cams in your checked bags. No hairspray, shaving cream, foot spray, deodorant, etc...
You'll get to your location and notice it's missing. Apparently it is an explosion hazard in the non pressurized cargo hold of some planes. And since the people checking your bags don't have time to see if the plane you're going on is going to have a pressurized cargo hold or not, they just chunk it all out.