Followed a Maddog into LGA one time back in '07. The tower asked him if he was going to the MAT. Poor guy had no clue what the tower was asking him, and answered, "No, there is no Matt here."

Tower asked again, "Are you going to the MAT?"

Guy answered, " I don't know what you are asking me. MAT? What's that?"
Before the tower could answer, an older voice answered, that yes, they were going to the MAT.

Wasn't you Buzz was it?

Same time frame, had another 88 try and cut inside of us at SLC because the capt had extended downwind. Tower told them to follow us and they answered, "If we turn now we can land and be out of that 757s way." Tower tells them, "No, just follow the 757."
Thought the captain was gonna have an aneurysm. When we got to the lounge, he was still sputtering about it. A few minutes later the 88 crew walks in and it turns out that the captain was a friend of his giving IOE. Before the Bossman can say anything, the LCA starts laughing when he sees the red face and says, " I know, I know, I already told him we don't do things like that to each other." Turns out the FO was a newhire Skywest guy and he was too embarrassed to go in the lounge.

So don't worry. Whether you are M or C, you're gonna screw something up. It's only a matter of time. Just be able to laugh at yourself and don't get wrapped around the axle. After all, that is what that friggin light pen test is all about!