When you have to blow up a tank and you dont have any rocket launchers, take your C-4 and have it out then have another team member, or you, throw a smoke bomb right next to it then the person with the C-4 runs to the tank and you have to get all the way against it then crouch down and and face it put one piece of C-4 on it then throw another smoke bomb and when it covers the tank or makes it so it cant see then get on your feet and run back to your team members then detonate the C-4.