I'd be surprised if the Tempest/Grubber quote wasn't a reference to Pretty Woman just like they used multiple characters to do "Hungry Hungry Hippos".
When Tempest found them at Capper's place she said "Trusting friends? Big mistake. Big." and Grubber finished with "Huge!" just like the iconic scene in PW when she went back to the clothing store and said "You guys work on commission, right? Big mistake. Big. Huge!"
Also, "Lions, Tigers, and Bears, Oh My!"