shaba saqi shaba..
saqlain was one of the best off spinners of all time and the best one day spinner of all time. his career was cut short due to injuries otherwise he was on course to become the greatest spin bowler of all time.
the dusra was introduced by him - it was called the mystery ball.
exactly. the trick is to release the ball from the back of the wrist/hand. This takes a lot of practice and can be stressful for a finger spinner. daniel vetorri the left arm spinner uses a similar technique to bowl his 'wrong un'. however even since icc allowed muralitharan and shoaib akhter, all kids ended up following wrong actions.
saqlain had a text book bowling action and very smart cricketing brain. I have yet to see an off spinner bowling at the death but he and wasim used to regularly bowl in the last 10 overs for pakistan.