Globe of Terror
Another dangerous circus act is brought to us by the Globe of Terror (or Globe of Death). Much like the Wall of Death, the Globe of Terror is an act that partners centrifugal force and motorcycles in a combination most of us would rather avoid. It involves putting several motorcycle riders in a steel sphere where they ride around at 60 miles per hour (97 km/h) with wild abandon [source: Gallacher]. For good measure, there might be an aerialist hanging from the middle of the cage performing, too.
As you can imagine, this is not a fail-safe act. In 2015, riders were injured in a Globe of Death act when two performers crashed into each other during a ride in Washington state. No one was killed, but at least one rider sustained a fracture [source: Johnson].