If you lie in front of any of the perk machines on DR, you will get 25 points. You can only do this once per game per machine.

Note that Juggernogg and Speed Cola (IIRC) adjust your point score by a fictional 30 points and Quick Revive and Double Tap by a fictional 20 points (I guess the game wasn't designed to have anything but zero on the end of your score), but they each actually give you 25 points.

This is the reason why your score says that you have 3000 points, yet you cannot buy something that costs 3000 points; the game said you got 30, but you only got 25.

So if you ever get points from the machines, either hit 2 of them or recognise that your score is 5 points less or more than you think it is.