Tongue-in-Cheek

Why were you teasing Sonia about her new hairdo? She really took offense at what you said. I didn't mean to offend her. I was simply making a tongue-in-cheek remark when i said that it was too elaborate for a girl of her young, tender age. Well, she thought you were serious. She had no idea that you were just saying that as a joke. I'm really sorry. I suppose I owe her an apology.

Bend Over Backwards

When Joan first started teaching she was afraid that she would have a lot of trouble getting used to the kids and to the faculty. Her fears turned out to be unfounded, since everybody bent over backwards to help her. Everyone tried very hard to help her feel comfortable and adjust to the school.