Shredders

This does not have to be three separate rails. Simply hit a grind slowly and hop 3x on the same rail.

Here’s a good spot for anyone who wants to try it legit!

Location: Petrov - Dam

From spawn, just follow the path in front of you and once you’ve gone down the hill a little, you’ll be able to see the spot on your right.

One of the easiest rails to do this on, is the one in the mission Side Hills Euphoria in the Mountain Pass area. Follow Arthur until you get to a hill-shaped rail. Your entry is usually slow enough since the rail goes upwards before going over and down the small hill it's on.

Simply jump with from the small ramp before the rail to get on it. I got straight up on it, so I did a 50-50 first. While still grinding, jump again and with land on it with a Boardslide, BS or FS doesn't matter. Then do it again for a third time, either doing a Tailslide or another Boardslide.

I'm not sure if you have to land it or not, but it popped straight after I landed it.