This is my best run so far. (20.4)
How?
I've gotten an 18 second time, but didn't screenshot; just hit this
I definitely didn't use an intended route, but still works ig
While trying to figure out how you got an 18, I got a 16.5. Turns out benches are the perfect ramps.
If you flick your mouse upward on the ramp to the b-hop bridge, you go farther. Just a tip in case you can't get enough speed to make the jump
I managed to do something similar once, but haven't been able to replicate it, definitely worth getting consistent.