Grab hold of something.
2 seconds sound clip from the Back to the Future Part III movie soundboard.
You can hear this line at 01:47:12.560 in the DVD version of the movie.
Quote context
[...]
- Nice set of wheels. Let's see what she can do. Next green light.
- Come on! Get on! Yeah, go! Go, go, go!
- Yeah, you think I'm stupid enough to race that asshole?
[...]