Hey DM,
Best bet is to spot your landing first, then make sure you bend your knees to absorb impact. If you are landing hot, you'll likely be coming in quite heavy.
I find it easier to let go with my back hand for balance. you also have to make sure that you land tail first and need to be aligned perfectly with the direction of travel otherwise a caught rail is gonna give your eye sockets a flush as you face plant so fast you wont have time to close your eyes (first hand experience!

)
If you are coming in so fast you know you aint gonna make it, butt check the landing to ease the load on your knees. No prizes for busted knees and a season watching from the side lines.

Hope this helps,