A bunch of 2p games on tetris battle (facebook) where I use ST stacking. Some games also feature the opponent doing ST stacking at the same time!
Im als doing some nice recoveries back to an ST stack after failing it.

ST stacking is actually the best way (I belive) to play 2p due to the KO system. I can play gems without ds at all as long as I get KO's faster than the opponent and send more lines :D

And yes, the opponens aren't any good many times, I know..