On the train ride, Mona is telling us, "Two things that I hate are being cold and in dirty water." Beth assures her she'll be fine, and then shakes her head at the passing trees. I suspect that right now, two things that Beth hates are Mona and Mona.
Katie hits the mud so hard that Max jumps back with the pole to avoid getting splashed, but he manages to help her out. "Careful, don't fall," he repeats as she runs over to the bridge, slipping several times before she jumps in the ditch. During the swim out, she's virtually zooming along as Max tells us that Katie prefers tanning on the beach to actually swimming in the water, let alone in a bog. It's not like she'd get much sun in that wetsuit anyway.
The other two teams have arrived at the bog, and Beth apparently isn't running fast enough for Mona after they get off the train. The country singers are behind them, noticing the smell of the bog. Max watches as Katie, who apparently peaked really early on this task, switches to a backstroke and reaches the far end with a minute down. Her performance goes downhill fast on the return, as her mask fogs up and she stops swimming because she's somehow lost, in a shallow ditch fifty yards long and no wider than a residential hallway. Eventually she makes it back to the starting point, climbs out and wanders blindly over to the finish line, where she knocks over the timer that's now reading 3:09. She interviews how glad she was to have made it, "Because there was no way I was doing that again." They get their clue for the Thing with the Ring, and I don't know how Max refrained from making a joke about his best man.
Mona interviews that she's not sure she's ever been this scared, which would seem to indicate a low danger tolerance for someone who competes in roller derby. Hell, the ones I know jump through the ice into a Minnesota lake every winter. Mona does a shallow cannonball into the mud pit, hauls herself out while emitting high-pitched moans of panic through her snorkel, and hits the ditch. She swims to the far end -- still freaking out -- and turns around, asking, "Where am I?" Beth interviews that this was the one moment on the race when she didn't think Mona would pull it out. Indeed, Mona's freaking as she struggles up the ladder and across the tall grass to the clock, which stops at 2:52. "Seriously, I don't know that I have ever been that... crazy," Mona interviews. After opening the clue, Beth leads her off to the tent, where she's still in a panic all the way through the removal of her wetsuit. Or at least all the way through the part that can be shown on TV.