Lol, this has got to be the most annoying thing a pilot can do to its gunner. I know how to do it, but I have never used it because it is just way too mean. I will tell you a couple solutions for this though.
Always spawn as spec ops when you are gonna board a chopper. As soon as it spawns hop in so that you guarantee yourself a seat in the chopper. While the other people waiting run around like dumbasses, hop out and place 2 C4 charges on it, switch to detonator, and hop back in. If the pilot decides to be a smacktard and takes you to the edge of the map, just savor what is about to happen. It's good if you type like "WTFOMGROFLCOPTERBBQ WHAT ARE YOU DOING OMGZORS" so the pilot thinks he's about to kill you. Then as soon as the the countdown is over, hop out and blow yourself and the chopper to oblivion and laugh your ass off. This is extreme payback.
Lather, Rinse, and repeat until you get in the pilot's seat... and then you can do the same out-of-bounds kill to the gunner or whatever you wish.
Always spawn as spec ops when you are gonna board a chopper. As soon as it spawns hop in so that you guarantee yourself a seat in the chopper. While the other people waiting run around like dumbasses, hop out and place 2 C4 charges on it, switch to detonator, and hop back in. If the pilot decides to be a smacktard and takes you to the edge of the map, just savor what is about to happen. It's good if you type like "WTFOMGROFLCOPTERBBQ WHAT ARE YOU DOING OMGZORS" so the pilot thinks he's about to kill you. Then as soon as the the countdown is over, hop out and blow yourself and the chopper to oblivion and laugh your ass off. This is extreme payback.
Lather, Rinse, and repeat until you get in the pilot's seat... and then you can do the same out-of-bounds kill to the gunner or whatever you wish.