Cross over hands with loop
Mark out 2 x 20m channels at right angles to each other. Have 2 groups of 4 players each line up across the one side of the grid, one group behind the other. Another group of 4 lines up in the other 20m channel. Each group has a scrumhalf just outside the channel who will make the passes to the oncoming groups. Drill starts with the first scrumhalf passing to the first group running out into the channel, the first receiver passes the ball on and immediately loops around the outside to get the last pass and then passes it on to the next scrumhalf and the drill repeats with the next group in a continuous fashion.