The reaction might jolt the car forward far enough to clear the explosion.
5 seconds sound clip from the The Green Hornet, Ep: 10, 11, 24, 25 TV Series.
You can hear this line at 00:49:23 in the DVD version of the movie.
Quote context
[...]
- And the vibration caused by their car will be more than enough.
- The first thing we're gonna do is stay calm.
- Listen.
- I'm going to fire the rear rocket.
- The reaction might jolt the car forward far enough to clear the explosion.
- No.
- In that instant the car should move away.
- What if it doesn't move fast enough?
- It's the only chance that we got!
[...]