How do I break the temple's teeth?

U need an averagely upgraded car, fully upgraded boost power up.
I advise the lambini or the dune jumper. These will cost you a lot, so don't try it if you are new to the game.
There is a part of the beach, just after a tunnel, where theres a really high jump, and just before it there will ne a boost pickup. Take the pickup, and go for it! But this achievement is the last achievement of the game, and videogames always have one common rule when it comes to purchasing/achieving things, "The last one is always the most difficult/costly and important.
Good luck, hope it was helpful!

Full upgrade Car: Beach Buggy or Dune Jumper.
Full upgrade Powerups: Boost

If you are new to the game don't start with this achievement.

View: best view is the long road with a dead end. After the dead end, then comes a tunnel looks like a face. You will notice teeth.

Best timing: Car in full speed, try to avoid using break, capture the fully upgrade powerup "Boost" then bang!

I achieved it when I was using "Dune Jumper", I did it again when I used "Beach Buggy".

You don't really need fully upgraded boost. You just need a fully upgraded car. I recommend beach buggy cause that's what I used.
After coming out of a long cave, there will be a very high jump that leads to another cave. If your car is fully upgraded and you are on full speed, you will hit the temple's teeth before you enter into it.
It is very difficult but not impossible.
Goodluck

Take a fully upgraded Beach Buggy..use Rez as you're driver..nd drive at full speed..when the tunnel's about to end, use Rez's powerup..u'l break easily break tiki temple's teeth..

I did it in my 1st try..