It is done with 2 people and can be quite tricky to pull off without being spotted as stealth but once the nuke is layed it is almost impossible to disarm. The first person must climb up on to the top of the CT (control terminal), the second must jump onto the keyboard just below the first person. You must get the timing just right so that when the first person jumps the second jumps to and pushes player one onto the block.
To do this you have to go to the end of the ledge shown on the picture, if one person stands in the corner and the other one gets him to jump on his head he will then be able to jump onto the legde shown in the picture.
BTW: This glitche is for non flying maps as you can see in the picture.
You can do this in both trees on the Nod side and the Gdi side.
Nod side: the Nod side is by far the aesest of the two glitches, to proform this glitch firstly you have to go up the ramp to the right where the cave is past this there is a paart where you can walk onto the wall from there you can jump into the tree
Gdi side: You need two people to get in the trees for Nod go to the right corner here you need to do the normal thing getting the person to jump on you head, with a bit of skil and very little lag you can run allong the top of the metal wall and jump in the trees but once in you cannot uses the directional keys or you will falll out.
pro's and con's: the most obvious of the pro's is that no one wil expect you in the tree so you can secretly snipe them, con's are that you are not able to move when you are in the tree or you will fall out making you a easy target to people that spot you..
