FATMAP difficulty grade
Whale Tail is usually three jumps.
The one farthest uphill is usually sent the biggest.
Its great for stuff like 360s and 720s and even corks and rodeos if the landing is good, but most of the time it's hard as a rock.
If you're experienced enough, backies and fronties are possible.
It is extremely dangerous and rare, but in some occasions double backies are possible but 90% of the time the jumps aren't big enough.