Slash Screen 1 and 2 - Logs

Screen 1

Screen 1 has classic logs on waterfalls platforming.

No matter your strat, start by sliding up to the first waterfall as fast as you can, boosting through the Dino. Timing matters.

Safe and Slow

Use Rush Jet. Get on top of the screen and maybe be wary of the birds at the end, but otherwise you should make it without a problem.

The next screens call for rush Jet anyway, so switching isn't entirely bad.

Faster and Dangerous

Jump the the waterfall with logs (the first one you just jump over). The moment you see water cresting over the edge signaling a new log, slide to it. Jump to the next ledge.

Repeat this with the next two water falls. When you see the next log appearing, immediately slide to it.

The rest of the screen is just slide jumps and avoiding the birds. Get up the ladder on to screen 2.

Screen 2

Climb to the top of the ladder. If you are not already on Rush Jet, pause and switch to Rush Jet (you need Rush on screen 3 anyway). Use Rush Jet from the top platform to the top of the left ladder and climb up.