What Kirk needs is a flying suit with an automatic collission avoidance system. What happens with one of these is that the suit detects him slipping. When that happens, helium suddenly goes into the suit getting him slight positive buoyancy, then a small jet fires off and redirects the suit and person wearing it such that they don't fall. Once that much has been accomplished Kirk can let helium out of the suit and land safely. Jude <dashielljt(at)gmpexpress-dot-net>