1)Make sure your head is well inside the bubble ball and don't lift the bubble ball too high.
2)Limit the running distance and speed.
3)Use the sides of the bubble ball to knock down with other players, not the top.
Size Guide
1)Diameter 4 ft: Suitable for children (ages 8+) with normal size
Height: 3'9'-4'9'' Weight: 60-100 lbs(normal size)
2)Diameter 5 ft: Suitable for teenagers, adult with normal size
Height: 4'9''-6'3' Weight: 100-250 lbs