Running from snipers!?

In my opinion, you should never jump around when trying to avoid a good sniper, because shooting someone the moment he lands is far easier than a strafer. It's a good idea to strafe while shooting, or using a flash to either distract the sniper or use the bullet impact to jar their aim and grant you a second or two of continued survival for every bullet(s) that hit the sniper. Results are better with accurate guns.