Problems were discovered after the first three rides were built. One problem was clearance between the riders and the track overhead. After the trains were mounted to the track, it was quickly discovered that riders could reach and touch the track while the train was in motion, posing the risk injury. Vekoma had to improvise, adding new bars to the original shoulder restraint to prevent guests from reaching up too high.
During tests it was discovered that trains would
stall in the middle of the cobra roll. Unplanned, the parks installed emergency unloading scaffolding in this location, similar to other Boomerang roller coasters.
Another problem of the ride is the locking mechanism for the shoulder restraints. The GIBs required the use of a battery pack to unlock each restraint in the event of a power loss. Virtually all other roller coasters have a quick manual release system to unload in unusual locations or emergency situations.
Some riders complained that the restraints give too much room for the riders to "fall forward" during the lift. People who were barrel-chested, overweight or
obese complained of chest compressions during the moments that they were on the main lift. Another problem with the restraints was that sometimes the belt attached to the bottom of the restraint would detach from the restraint posing a greater risk that if the restraint lock would somehow malfunction there would be nothing else to keep the rider from falling out of their seat.