In a special episode of the show, set to air Thursday (9 p.m. ET) on TLC, Orange County Choppers' motorcycle builders Senior, Junior and Mikey pay a visit to the Gosselins' Pennsylvania home to spend time with Kate, the kids and to plan the design custom chopper for Jon.
In an exclusive clip from the crossover episode, Mikey arrives with a ventriloquist dummy, hoping to impress the sextuplets with a lunchtime show.
"I hope I don't bomb," he says. "I'll probably be pouring sweat for it but it's all part of the excitement."
Once he introduces the kids to his "friend Charlie," Kate asks, "Is he cute or is he scary?" Lucky for Mikey, the kids seem to agree that the dummy is cute.
At one point, Kate comes to a nervous Mikey's rescue, dabbing sweat off his face with a paper towel.
In the end, "All the kids just took a shine to Charlie the dummy right away," Mikey says. "And they just wouldn't leave him alone. In fact, they almost pulled him apart."
The crossover episode of Jon & Kate Plus Eight that will feature more of the guys from American Chopper airs Monday June 15 (9 p.m. ET) on TLC.