Character mistake: Bud keeps calling Sarah "Ma'am." Sarah is a corporal. Corporals don't get called ma'am or sir in the US Army. Bud has been in the Army for seven months. No soldier would make this mistake after the third week of boot camp. Anytime you call an enlisted man or NCO sir, you are looking at about 20-50 push-ups or sit-ups to correct you. It's conditioned into you.
Day of the Dead (2008)
1 character mistake
Directed by: Steve Miner
Starring: Mena Suvari, Nick Cannon, Michael Welch, AnnaLynne McCord
Factual error: All the soldiers that have rolled up sleeves have them rolled up Marine style (with the inside of the sleeve showing) despite being US Army.
Doctor Logan: Great. A driver without keys and a soldier without bullets. It must be my fucking birthday. What's with you two?
Bud Crain: You know what? It's complicated, okay, pal?
Sarah Bowman: How did you get here?
Doctor Logan: Taxi.
Bud Crain: Great. Well, you're nominated to go out and hail us another one.