Maybe try wingsuit flying or free soloing, knowing that I basically have a get out of jail free card (assuming the teleport doesn't preserve my momentum I guess)
Even if it does preserve your momentum, with some really good trigonometry, you could teleport to a location that would result in that momentum landing you softly and exactly at the top of a cliff. If you can redirect the momentum, it can be any cliff. If you can't, you'll have to choose a cliff in another part of the world so that gravity burns off all your inertia at just the right time.