Yeah, I'd leave that shotgun behind too
Especially after KNOWING there are aliens about, it certainly wouldn't come in handy at some point in the very near future...
It was alright I guess, very slow moving and way too slow for the buildup, CGI was where they spent the entire budget, and it still wasn't enough.
The other problem I had with the movie though was why the fk the alien was playing chess with him, as if they'd know how to play, and even less of a reason if it was only wanting to kill him.