Try to do these in reverse by lobbing the club up in a flat and catching it with the higher hand with the thumb or fingers.
playing with height and speed of move is really fun to do as well.
Tips/Hints
1. Focus on the grip and your fingers and thumb being two separate entitys.
2. do as slow as possible
3. match to the beat of music
4. try dropping all three into one hand
5. moar