Seeing this shadow scared the hell out of me. If anyone hears or sees anything abnormal please comment and let me know.

No kids on this trip and the one guy worked there was directly above us. No doors or outlets on that end at all. Pretty cool stuff.

I heard there are tunnels under the museum

your not crazy pal at O:32-35 before the real side black shadow there was someone back there please tell your child not to spook you. and if its not you then the curator was down there lurking trying to generate interest in the museum. if those arent the explanations then the place is haunted as a lot of that stuff was used to actually kill people and soldiers( iam one of those vets) we get extremely attached to our war trophys to the point a lot of us tell our families to bury them with us.