You hear the bidding go as follows:

North     East       South      West
Pass       1          2          3
4         Pass        Pass        5 (after a long pause)
Pass       Pass         ?

What on earth is going on?
Your 2 bid was weak in principle (making allowance for the vulnerability).
How can a Passed partner raise to game?
How can West judge his hand worth only 3 then, when he hears that partner doesn't want to bid a game, try for the five level?

What do you do?