Challenges for experienced players

You think you're the best at Ignition? Did you beat all your friends and think nothing can stop you now? Well, think again. Here are some challenges that will require you to be the best there is.

THE SMOKE CHALLENGE
Difficulty: Medium
Pretty straight forward. Win races as Smoke. Gets a little harder at higher difficulties.
Watch out for: Some jumps in Novice, and even in Amateur. You'll need to turbo so you can make the jumps.

THE NO-TURBO CHALLENGE
Difficulty: Hard to insane, depending on the difficulty and car
If you use Ignition, this usually isn't that hard. If you use any other car, however, it gets tricky. The idea is to win races without ever using the turbo.
Watch out for: Any place where you can lose crucial seconds, you can't slack off at all if you try this challenge.

THE LOOOOOOOONG CHALLENGE
Difficulty: Easy, but it can be irritating
Always take the long way. In Moosejaw Falls, never risk being ran over by the tractor or train. In Snake Island, use the "Long Way".
Watch out for: Getting on one of the last places. You won't be able to use shortcuts to recover!

Some challenges which just involve you doing a certain task:

THE BIRD CHALLENGE
Difficulty: Really easy once you figure it out
Crash into an invisible wall with a car, then respawn in a different part of the track

THE ROCKET CHALLENGE
Difficulty: Insane to find, slightly easy to do
Up, up and away! With a car, simply rise into the sky, there's nothing more to that. No, I don't mean barely, I mean really high, crashing into the invisible wall.
HINT:

Spoiler:

i know how to do the bird challenge!! in snake island i bumped into the bridge and re appeared on it!