Mission 20 (Operation Lawn Mower)
1st. upgrade Flamethrower to the max Lv you can go so far!
2nd. choose the Police Car (max upgrades you can get)
3rd. Start the Mission and pick up the Flamethrower on your Main-Base,
now drive all the way north on the Streets that goes directly to the Boss!
Make sure you drive on the right lane and use your Boost/or not,
do not hit any of the Fattys!
4th. Now attack the Boss with the Flamethrower
(just stand in front of him and use it until you run out),
once it is empty grab the other one lying around the Boss,
also have a look on your health.
The Boss will die in an instant with that Weapon!
5th. once the Boss is death , heal up and then grab the Bomb from
the outer-Base and place it where the Boss was standing,
drive back all the way south and done.