This is a Chuck and Greg story to which I was an eyewitness. I'm sure you are familiar with it. I don't know if it is suitable for public consumption, but it is typical Chuck style funny. Others probably tell different versions, and they are all factual and accurate.
I think it was senior year. Chuck, Greg and maybe Joey and Tom and Scott and Ashley and Patrick and I were sitting in the cafeteria, and Greg said he should get to math class, because it had already started.
As a joke, Chuck wrote Greg a completely inappropriate tardy excuse note, signed by the principal, Mr. Lipscomb. Greg read the excuse, laughed, and said he would use it.
Chuck laughed, too. Chuck assumed Greg was in on the joke, and would not really use the tardy excuse. Because this was not a tardy excuse you would show to a teacher.
Greg, however, had not carefully read the excuse. It seems he thought the forged signature of the principal was the entire joke. I guess Greg was willing to take the risk that the teacher would overlook the highly suspect signature, though you would have to ask Greg about that.
Laughing, Greg took the tardy excuse and went to class. We were all laughing. It was funny. Greg wasn't really going to try to get by with that completely inappropriate tardy excuse, was he? Of course not.
Next time I saw Chuck, maybe 2 class periods later, he was in tears of laughter. Barely able to talk from laughing. Greg had used the tardy excuse. Greg showed the tardy excuse to the math teacher and was immediately sent to the principal's office.
Greg was sent to the principal's office because the excuse Chuck had written read "Please excuse Greg. He was taking a shit. Signed, Mr. Lipscomb."
Chuck told me years later that Mrs. Barker had talked to the principal about it, and he still remembered the incident and thought it was very funny.