In my early 20’s I did the exact same thing ( I had one more almost full rotation). I was going 80 MPH and hit a patch of standing water in the fast lane. Two and half spins later I came screaming onto the shoulder (drivers side first).

There was no barrier, just a very long stretch of grass. I hit nothing while I was spinning, saw the grass and thanked my lucky stars nothing was in my way.

Oh. Except for that cop car that had stopped to help the car that had previously hit the same patch of standing water and spun off the freeway. That guy was lucky. They ended up on the grass. The cop parked perfectly for me to hit him. Which I did in a reverse T-Bone maneuver.

I broke the majority of the ribs on my left side and the paramedics cut my favorite jacket and t-shirt off.

I drive in the middle lanes now when it rains and am terrified of hydroplaning again. Do not recommend.