re: Poker & BUBBLE BLIND VS BLIND
IMO no it was a mistake.
The SB has just invested 2.5BB of his roughly 13BB stack.
You go all in.
If he has big cards.. which his raise with that sized stack indicates, then he is likely to call for another 10BB with pretty much any pair and Any broadway.
You are holding 44, and are correct that he dosent know that.. but realistically he is not in a folding situation.
If he folds then he has about 10.5BB left, if he does it again he had 8BB left.
If he tought the situation was worth a raise he probably intends to call an all in or shove any raise.
With your stack size yu do not need to be playing this way.