She did perform one of the more convincing falls in the show outside the redshirt tumbling off the transporter in "CatsPaw". Remember in "The Immunity Symdrome" when the "void" surrounding the giant aeomeba made everyone black out? Majel walks into the exam room carrying a tray. Rather than "gracefully" folding her legs in a kind of "I've got the vapors" feint, she "crashes" to the floor, dropping the tray resulting in a jarring clatter! In fact, they used that sequence again in "Spock's Brain" when the brain-napper uses her wrist device to "stun" the entire crew.
It may be a small thing, but I've long appreciated that stunt.
Sincerely,
Bill
I always admired that fall, also because Magel's head bounces against the floor when she hit.
However, it was filmed for and used first in "Spock's Brain" and reused in "The Way to Eden." There were no shots of the crew passing out when the Enterprise pierced the Zone of Darkness. McCoy and Chapel were doing just fine giving out stimulants.