Daredevils who want to pretend like they’re a part of the 2013 mega blockbuster, Iron Man 3, listen up. Fox News reports that numerous resort cities around North America, including San Diego, California, Key West, Florida, and Cancun, Mexico, are beginning to include jetpacks in their recreational rental offerings, alongside more traditional motorsport vehicles like jet skis and speedboats.

The gadget, called the Jetlev, uses a powerful pair of water pumps to propel its passengers up to 30 feet high. The water is pumped from a small unmanned boat into a backpack-like contraption through a hose, and then the backpack pumps the water back out in rapid jets to allow for legitimate flight. When the pumps stop or the ride ends, passengers simply dive into the water for a grand finale.

A jetpack-endowed snowboard apparatus, called the Flyboard and designed to work in very similar fashion to the Jetlev, also allows users to defy gravity, this time up to 45 feet into the air.

However, while the Jetlev and the Flyboard are collecting buzz around the web, from travel message boards to YouTube videos, not everyone is so pleased with the futuristic technology. In Hawaii, a number of local fisherman and ocean-oriented scientists have seen the Jetlev and Flyboard as a disruptive or downright dangerous machines, and the widespread uproar about the gadgets has encouraged the Department of Land and Natural Resources to enter into the equation. Last month, the organization held a public meeting about the new-fangled motorsport devices, and the reception by many was less than positive.

Randy Awo, a top enforcement officer with the Deparment of Land and Natural Resources, said his concerns were mostly with the Jetlev riders, who he has seen participating in dangerous daredevil tricks too close to other boats for comfort. Local fisherman and scientists, meanwhile, argue that loud watercraft devices scare fish away, disrupt their habitats, or even kill them outright. The risk even extends to coral, as larvae can easily be pumped through the Jetlev apparatus and not live to tell the tale.

Hawaii is looking for a solution to the problem, a process that may eventually lead to Jetlev gadgets being allowed in certain locations but banned in others. For his part, Jeffrey Krantz, the owner of the only Jetlev rental company on Oahu, believes that regulation is the answer, not restriction. Of course, Krantz has a vested interest in making sure that the Jetlev remains a part of his product stable: he currently sells about 10 Jetlev rides a day, each lasting for 15 minutes and selling for a steep rate of $179.

Want to see the Jetlev in action? Click here.