Probably the one I did when I was in third grade. I spit my gum on the hair of my classmate sitting in front of me and pretended I did not do it. No one suspected me coz I'm the "most behave" in the class. idk what got into me that I did it. they had to cut her hair to get rid of the gum. 😅😂
Lol. I guess there was a mischievous little kid lurking in you back then after all.