I have been very lucky in that DS 8.5 months has never been a sicky baby - he's probably like me in that he likes his food too much to let it go.
Last night he decided to bring back nearly all of his dinner in one fell swoop (AK plaice recipe) about an hour after eating, and the rest 2 hours after that. He was then quite happily drinking water and berastfeeding within 5 minutes both times. He hasn't been unwell apart from the snottiness that he and the rest of the local children have had for the last few weeks and he is his usual happy self.
After the second bought of sick he then slept through with no problems.
So was it :-
a) a dislike for AK recipes
b) fish and him don't get on - his dad has an allergy to pink fish and, although this isn't the first time he has had fish, this is the first time he has had plaice as it was cod before
c) he has been swallowing too much gunkiness from his nose and it wasn't sitting too well
d) his dad fed him a crumpet with honey on it for breakfast and that was the culprit
e) the formula he had disagreed with him
f) he thought that his mum, the sofa, the carpet and his bedding could do with a few orange accents
Any thoughts would be gratefully received