this happens when you fall form the sky wiht a parashoot usually when you fall form a plane and it happens just like this when you have previously /onb on a bike and while dropping with a open parashoot you press Alt and you are with a para on a bike .....not necessarily a gravity glitch ...i htink it's a /onb glitch

not sure if there are other ways to do it  and m not sure if it's exactly a /onb glitch  

But good combo  a that glitch on a bike with gravity changed is a fun combo  liked the part when you bump the walls and go higher

Thats old man.. I found out that like the first week I played on WoS lol. Funny thing is.. it works as a no fall glitch. You cannot fall off your bike once the glitch is activated.