Water Jet Pack

  I saw this guy using one of those hydro jet packs down in Florida. I’ve seen them online and in videos before but it was really cool seeing one in person. I wonder how they work? I didn’t see any controls in his hand that regulate water pressure, I don’t know, maybe it uses foot pedals. Someone want to explain to me how these things work??? Anyway, I’ve added one more thing to my bucket list.