@UP_Hawxxeye Lots of people stop to shoot or move in straight lines. After playing online as long as I have, you pick up on these tendencies and exploit them. They'll jump if they're actively fighting someone else, it's the rest of the time they follow patterns.
Drop C5 and let a player spot you. 95% chance they give chase and blow up. I've grabbed flags in UT99 and used cover to double back because too many think you'll make a beeline home. Weak snipers forget to move so aim for the reflection. Um, there's just a lot of little things.
Was about to say a sniper rifle was one of my top weapons but I edged it out with the railgun. Cool.