Oh God 
Not long after ds1 was born, I was still above my normal weight, and joking about it to all and sundry - to stop em taking the piss.
I made a mate who was living in dr's quarters same as me - we went shopping, hung out together, and kept each other sane - through teletubbies at 10.20 and beyond...
One day we were in a department store, (heading up to the cake department) and got in the lift with buggies etc. The lift ground to a halt between floors...
"Will the woman with the blue fleece please get out - the lift can no longer carry you..." I intoned happily (I was wearing a blue fleece)
My mates eyebrows were raised and she had a fixed expression - I gazed around - there was another woman with a blue fleece in the lift!
Just to clarify things, cos I was mortified, I pinched my nose and intoned - "I repeat - will the woman with the blue fleece with green on it - please get out of the lift...." My mates eyebrows were in the back of her head by now - I glanced across - she has green sleeves on her fleece...
Trying desperately to rescue things I blurt out "LOOK the woman with the blue fleece, the green sleeves with a yellow band wearing jeans- can you not get out of the lift - we have people waiting!
My mate was on the floor, as I looked at this poor poor woman who was wearing an identical fleece to me, and was also wearing jeans... (and who was clawing desperately at the door by now)
The lift came to a shuddering halt at its final stop - that poor woman shot out like a bat out of hell, and myself and my friend? I was so so mortified - you couldn't make it up, and we cruised up and down the lift for about 10 minutes with me wailing and her howling...
I still cringe...