I used to jump off our couch back in the 80s. My mom used to give me shit for that.
I wasn't very good doing it back then.
Last year I jumped off the top rail of our deck in the backyard. We were having a barbecue and the brew/whiskey was flowing with some nice CVH music to boot.
So I gave it a shot. Our deck floor is about 5 feet off the ground with the top of the side railing going up another 5.5 ft or so. I tried to jump high enough to get a good split going.
Nearly killed myself doing it. I wasn't sure if I actually attempted a good split but coming down was the hardest part. Had a ankle sore the next day, thought I had sprained it while coming down. Luckily it wasn't.
Fun times.