How can I get my baby panther to stop being so dang afraid of me?
>snipped<
Is there any way to break him into being not-terrified of me?
You can't jump into handling without accomplishing the first part: reducing his fear response to you. If you don't start there, you'll continually get that leaping/falling reaction because the base "problem" (which isn't a problem in the wild, it keeps him alive) is fear.
The way I get my chams to not fear me is to be in view without being scary or touching them. I place them in their cages (or free-range trees) up high, and then I go across the room and sit down on the floor. I might have my keeping journal to make notes, but for the first few times, I don't. I don't make eye contact and I hold as still as possible. This makes me seem smaller, less scary, and keeps my movement limited. People tend to move so fast that a cham can hardly register it. Try to not scratch your nose, stretch, or make any movement. If you are still, a cham has time to observe and decide if you are threat, instead of just instantly assuming you are. At first, the cham may shadow its perch and stare at you... after a few sessions, he'll bask in front of you... some even get curious and try to get closer to you for a better look. When the cham no longer keeps his eyes locked on you, and shows relaxation, you can shorten the distance between you each session.
With some chams, this goes very quickly, others take months. Once you do get your cham calm in your presence, you can start work with food rewards leading up to handling. Every cham is different and forcing them to go as fast you'd like only sours them to people.
In the meantime, if you have to handle your cham for medication, you can put a soft towel over it and restrain it. Chams are visual, so when that towel moves over it, it stops looking at you and focuses on the towel. A cham will associate the towel with the bad experience, and not your hands. It's important to keep your hands associated with good things (food) or a cham could fear you for life.
In my opinion, the only time a cham
needs handling is for home exams, vet trips, and meds. A particularly fearless (or hand-raised) cham will seek out a person to perch on, of its own free will. The "needy" cham is very rare. The rest of the time, it's the human who needs it, not the cham.