Saints row the third is different from the previous game.
It isn't as easy and to be honest the math they did makes NO sense.
Co-op doesn't help or hinder here as your score is doubled if you have two players.
Totally ignore the 'adrenaline' spots. As soon as the game time starts go to the map (if you have two players one goes to the map and the other pauses stopping loss of time).
Look for a highway...Our personal favorite was a on/off ramp.
Now just go there and play frogger with the cars. If you're near a off ramp try and get them as they gain speed coming down in the dip.
Also 'ragdoll' a second or two before the car is due to hit you...seems to get you more points :)
P.S The hubby scored over $805k in one hit...first time around doing it this way!!!