Said gaffes can be continuity errors, logic flaws, whathaveyou.
Hopper is shown, later, using a cellular phone to trigger the bomb.
Finally, almost all of these entries were submitted in good spirit. All goofs, gaffes, questions, and answers are no longer separated into seperate sections. In some cases, procedure is to call in anything odd. Even if this is not the policy here, however, it would be standard for the guard to call in every 15-30 minutes. Their TAC weaponry was also way out of line with the needs of a bomb detail.