A couple of parts that made me chuckle
1. The way Radcliffe was steering his truck hand over hand. Obviously has never driven a large vehicle before. Looked so unnatural. Trivial, I know, but made me laugh.
2. His comment on the firing range. "I'm not much of a marksman". Most people familiar with The Marines know they treat the rifle religiously. Every marine from the cook to the commandant has to qualify every year. Could have easily blown his cover with that one. In fact, it would have made much more sense for his back story to be former Army. Marines are obsessed with their cultural details.