http://au.youtube.com/watch?v=6AVXc5KGAJs i used to do this a lot prior to actually sparring, a good reaction drill. the filipino martial arts have something similar, that translates as catch baisically, you throw he throws a counter sometimes the same tech. sometimes just a slip or block or opposite tech that would make sense as a response helps build an instinct in keeping away from the opponent and automatically responding..enjoy