Mike: Hey, there's a naked lady in there and she's nude! With no clothes on!
Which is a Shout-Out to M*A*S*H, as Radar exclaimed that line more than once in the series.
End of an Age: The final episode (until the 2017 reboot) with an "invention exchange". Kevin Murphy explained in the ACEG:
"Right about this time we stopped doing invention exchanges. Let's face it, Joel was the gizmocrat, the one who brought that invention exchange spirit on board. And Mike? Well, let's put it this way. Mike is not an inventor. Creative, yes, artistic, sure. Innovative, clever, resourceful, all of these and more. But the sight of a screwdriver puts him in a cold sweat. He used to hire kids to build his car models. I had to explain to him what a lawn mower does. We wrote the instructions on how to change the toilet paper roll right on the wall so he wouldn't be embarrassed. Mike is many things, but he is not a tinkerer."