Once I was desperate for money and asked my dad if he could lend me some money, and I'd pay him back with interest... he laughed at the interest part of it, at my ignorance and obliviousness to his nature... I knew it was silly, but I didn't want to come across as greedy or unappreciative.
Once on my grade 11 trip to Europe I just happened to be heading in a certain direction and not paying attention, and some kids were clustered for a photo, and the guidance counselor laughed at me (in a good-natured, "Oh that's so cute!" way, but STILL!) because he thought (and it looked like) I was trying to get into the picture too.
Also on that trip, when I locked my keycard in my room by mistake and had to go down and get another one, and by the time I opened the door and got my ticket to Les Miserables and stuff, the group that was seeing Les Mis had already left... the guidance counselor went out and showed me where it was, and as I ran to get to it because I was late for it, he laughed, but that wasn't so bad. 