Yep, those things bother me, too. The movie "Super 8" was lots of fun but I had a hard time getting by the fact that one of the characters rammed a freight train head-on causing a spectacular derailment and LIVED.
Another one of my peeves used to be the way characters used an axe, obviously ignorant and inexperienced in every phase of felling, chopping, splitting etc. Not many shows with axe work (except horror movies) anymore so I can relax on that one.