That sounds like reflux, or it could have just been a wind behind some milk, iykwim??

I don't know how to explain the difference, but in a 2 month old if they bring something up just after a feed, it's mostly reflux/wind.

Don't worry. Keep an eye on him. If he spew again during the night for no apparent reason, I'll say it's vomit, but if not ... you have your answer I would think that if it's vomit he would look rather pale or not quite himself. But seeing he looked calm, he was probably just burping

Maybe your right and he was just a little greedy

That did not help much did it!!