Something I didn't know is if they are coming at you on a rocket that you hit them with shoot them again and you will have time to escape while they redirect that one.
I love this game it has an 80's and 90's action flick feel to it, i think Johnny may be a reference to John McClane from Die Hard so I like to play on rooftop as Johnny vs Scott because he looks most like Hans Gruber with the whole suit thing going on.