raising the flop for value - countings outs exercise

[Henke]

Just thought I would add a reason why I wouldn't raise this even if it would be marginally profitable; your relative position to the raiser. The 4 is a semi-hidden out, which probably wouldn't prevent BB from betting out again on the turn. Also, since he's BB, and betting into 3 ppl, he's not very likely to be bluffing, so if you do spike the 4, you'll be able to checkraise the field for big bets instead.