I can't sit on that, I'll break it!!

It is so hard to get my head wrapped around the idea that I am a healthy size now.The other day a co-worker offered me a folding chair to sit on. It was one of those tiny ones that in the past would have flattened if I had tried to sit on it.I thought, "Oh GOD! I can’t sit on that, I’ll break it!!!"And I said just that. "I'm sorry, I think I'll break it."Then he gave me this look like… what