After the very first obstacle, in which the first kid is run through a steamroller, he grabs the boy's ass and hoists him up to the monkey bars, then grabs the girl by the elbow so forcefully that she falls on her face. In a telling moment, Summers says, "C'mon, get up" juuust slightly off-mic -- enough that you have to listen to hear it, but not enough to doubt that he barely stopped himself from adding the words "or you'll upset me." It's like his whole fucking career depends on these kids winning this thing. Note that in this version of the show, it was kids-only, so there weren't any dads around to say, "Um, what the hell are you doing?"
Producer 1: "Was that an FCC violation?"
Producer 2: "Not in Reagan's America!"
*both high-five, wink at camera*
Summers is mesmerizing in his efficiency. From obstacle to obstacle, he physically assaults the kids in no way that would be allowed on TV today. At one point, he throws in an apology real quickly, maybe out of fear of what the other inmates are gonna think, or maybe because the show's lawyers just whispered in his ear, "Um, WHAT THE HELL ARE YOU DOING???" The best/worst part is when one of the kids tries in vain to crawl out of the pit and falls, presumably due to physical and mental exhaustion. Summers just pulls her by her arm, giving no fucks, and berates her to stand up. I can't stress enough how important this is to listen to with sound, because modern GIF technology hasn't yet adapted to incorporate Marc Summers' cold, cold heart. The attendants look like they are silently preparing their "just following orders" defenses.
"Don't, Brenda. She needs to learn."
And then, as the timer approaches zero, the boy going for the next flag just hangs his head in shame while Summers drags the other girl toward defeat, though her natural instinct is to get as far away from him as possible. Notice that Summers quickly checks to see if anyone is looking.