So, ever wonder why we have "best man" in the wedding party? Well, here's one explanation from Jenn Thompson, author of The Bizarre Origins of 8 Wedding Traditions:
"Talk about your runaway brides—the original duty of a “Best Man” was to serve as armed backup for the groom in case he had to resort to kidnapping his intended bride away from disapproving parents. The “best” part of that title refers to his skill with a sword, should the need arise. (You wouldn’t want to take the “just okay” member of your weapon-wielding posse with you to steal yourself a wife, would you?) The best man stands guard next to the groom right up through the exchange of vows (and later, outside the newlyweds’ bedroom door), just in case anyone should attack or if a non-acquiescent bride should try to make a run for it."