I don't know what this is called, but when you are barring 2 strings with your index finger and then bend another string but still have the 2 fretted and immediately play them. I need tips on how to do this.. here is an example from SRV's Pride and joy...

-------12-----12-12------12-12------|
----12----b15-12-12--b15-12-12-b15--|
b14---------------------------------|


Thanks,,