I had two HG pregnancies, and out of the many, many, many public vomming sessions, my favourite and classiest one was in Waitrose car park....on a Saturday morning.
I was leaning against a wall, with my hair in one hand and an apple in the other, going for it. A lovely Scottish guy appeared by my side, and said "I know you're not well, love, but you're blocking me and some other drivers...."
I nodded at him, staggered a couple of feet and managed to splutter "I'm not hungover, I'm pregnant..."
"The wife said you were when she saw the apple, love."
He got back into his car and his missus waved and congratulated me out of her window.
Then there was the time I chucked up in a neighbour's driveway, thought I was all done so knocked on the door to apologise and tell him I'd be coming back with my (by then well-known) pan of hot soapy water. His adult son opened the door, and I narrowly avoided vomming in their hallway by throwing myself to the side....
Again, he was lovely, told me to go home and lie down, and that he'd sort it out.
My second pregnancy was so puky that DS started to imitate me - we'd be walking along and he'd suddenly stop, put his hands on his knees and do a series of pretend retches...
Classy, classy, classy....