Replying to Progression....double shifties??

Been a lot of talk lately about people doin' triples and it seems about 50/50 if people are stoked on it or not.  Got me thinking about what I might rather see....Has anyone even attempted a double shifty? Is it even possible? You'd need a HUUUGE jump, sure, but someone in the bc could maybe pull it off?

I also saw a video once of Pep accidentally goin 90 and bailing to 270 the other way on a jump...just got me thinking....What would you like to see people try instead??