I have a friend who's trying to get a skill similar to that right now. Instead of doing the kip and putting your toes on the bar, she does a straddle kip and goes all the way through... its almost like a straddle penny drop, I've seen it done and it looks pretty cool! Sorry if I didn't explain that really well...
Wow... I feel so old. Way back when that was a popular bar change... like when beating the bar was still the norm, early 80's. That's when I started gymnastics. The skill to get was a brause, going from low bar to high bar, straddle cast and push away, reach between your legs as you are salto-ing forward to catch the high bar. If you couldn't get your brause, you did a straddle roll drop to kip on low bar for your release. I had my brause.
I think what I was thinking of was a straddled backward sole circle to jump catch to high bar. With some 7's they don't finish the sole circle enough and it almost looks like a cut before the crowd is waiting for them to pancake.
It's a bit hard to think of since I wasn't on the floor when I saw it and it isn't so fresh in memory.