Screen or Camera Shake

I must apologise for the noob question first up, but how do you make the screen/camera shake to give the effect of an earthquake or tunnel collapsing, etc? Also what is the difference between Camera - Sway Camera Source and Camera - Sway Camera Target (I think this is what the actions are called)

Many thanks in advanced for any help
--Elzarath

Use "Shake Camera Sourse" for that play around with the values untill the shot looks the way you want it to.

Thanks Forgotten Light..