If not for concrete, which the Romans invented, some of ancient Rome would not have been built at all. They had some amazing architecture. The Colosseum alone, according to Google, is the largest standing amphitheater in the world today.

Sargeants at arms are armed in the Canadian Parliament Building. In 2014, an armed intruder was killed by an individual serving in this role: "House of Commons Sergeant-at-Arms Kevin Vickers was lauded by members of Parliament Wednesday for his reported role in stopping an assailant who killed a Canadian Forces member in Ottawa." Just one of several expressions of gratitude: "MPs and Hill staff owe their safety, even lives, to Sergeant at Arms Kevin Vickers who shot attacker just outside the MPs' caucus rooms." —New Democrat MP Craig Scott. From CBC web site. Edited for clarity.

Not to be confused with paddling someone's fanny. ;)

As opposed to saying that the movie, person (e.g.) is a real hoot!