The last time I fell was over five years ago, more like ten I guess, after an ice storm when I went out to get the mail. I was walking carefully because of the slope of the driveway. That right foot thing, went out from under me and I did the Ethyl Merman fall from "Mad, Mad World" and landed flat on my back laughing as I fell. Managed not to whack the back of my head and just let my back take the impact, or at least that's what I like to think I did
No cameras back then or I'd have saved the clip. No damage to me at all other than wounded pride.
That looks like a Trex deck which will get slippery really quick, even with a heavy frost.