Watch this skydiver go through an arch rock formation in China with a birdman suit. Awesome!
https://www.youtube.com/watch?v=GUEZCxBcM78
But still humans are pathetic when compared to squirrels.;-)
I often wonder if humans could develop their muscles so as to mimic those of wildlife.
Still no answer to that question.
That was pretty incredible...and beautiful to watch!