When you get a Rhino tank, this one is pretty easy. You can summon one pressing
6x
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Press
while driving it to start the vigilante mission. It's very easy to shoot them or just rolling over them, if you get the chance.
Tip: Some vehicles are faster than your tank. Usually. But you can use a little trick gaining lots of extra speed. Align your canon towards your rear-side and constantly shoot to accelerate massively.
Also, if the cops are after you, they really are annoying. So get rid of 'em pressing
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And, as always: Before you downvote this solution, please write down a comment first and tell me what might be the problem. Random downvotes are unfair. Thx.