I can do the 18 hits in 5 seconds thing with a stopwatch, but hadn't you rather take 6-7 seconds and hit them really hard with 12-14 strikes (and yes, I count the rt. upward elbow, claw, lft. heel palm to the sternum, rt. scoop kick, rt. handsword, rt. knife-edge as 6 strikes). I do not add the strikes for each finger as an additional 5 stikes following the heel palm part of the claw ... calling that 11 strikes would be cheating ... I think.
-Michael
-Michael