I have been trying to figure it out as well.

There is a way to get under it... if it's the street I think it is, there's a downdraft way to the right that takes you under that updraft as well as one more to the right of it.

The trick is...POCKET SALMON!

or maybe it's not the street I thought it was... I'm curious now how to get down there

If you let it fling you up, when you drop back down you can drop further inside the spout lem.to/p/Z6Vs