For scienceG 5

Another achievement that isn't worth targeting directly since it will likely unlock through natural gameplay. Several vehicles attack/kill the scientists, so any time spent in these vehicles will rack up more scientists being knocked over, and since your first, default jetpack shoots bullets downward, nearly all scientists you fly over will also be knocked over. This won't be one of your first achievements since you do have to hit 1000 of them, but it will definitely unlock long before you're finished.