[vers]

BB isn't that deep compared to us so if we're going to play the hand, I would be shoving to isolate. Wanting to shove or fold depends on how wide shorty is opening, but since he's only got 3.5BBs we can assume it's pretty wide so shoving is close and probably correct against his probable range (something like 22+, A2+, K5+, Q7+, J8+ and a bunch of middle suited connectors). Also he's shoving the btn so it might be looser than this too. Shove is better than calling, you don't want to play a flop w/ a marginal holding.