When I was a kid this happened to me, I told a "friend" that I liked a guy when we were talking about crushes. Only I lied, cause I felt left out because I didn't like anyone, so I randomly said I liked a boy. About 2 minutes after they left they went and told the guy...and the entire school...I was so embarrassed. So I totally identify with her. But I did learn a very important lesson about lying. And trusting people lol.
Waaah, I've also experimented this once, in elementary school in 10th grade. I played with this friend at her home and she suddenly talked me about crushes : I've said I don't have one but she insisted so I've randomly said I've interested by a boy in my class otherwise she didn't let me go.. And next morning, everyone knew about it and I was also very embarassed, she said she didn't do this on purpose but she didn't look like sorry. But she has moved out next year.(sorry if I have a lot of spelling mistakes, I'm French)
My favorite thing so far was the "agressive leaning" of the employee. That was great.