The Player enters the Gunner position on top of the Hummer.   In addition to the above, if there is an "abandoned weapon" in range of the Player at the time the "Use" key is pressed then the Player's current active weapon is dropped and the "abandoned weapon" picked up instead.   Cam the "designer" be asked to explain the logic (?) that was used to justify the above nonsense?  

Kicked out of games many times due to Exceptions (with consequential loss of all coins "earned" so far) "Glitch Deaths" simply by walking into posts or climbing to the top of towers. Great fun! Hummers that blow up for no reason. Hummers that either refuse to move when you climb into the driving seat or they jiggle about uncontrollably. Hummers that inexplicably blow up when you collide with a player or sometimes shoot upwards to high altitudes. Multiple occupants in the driver's seat or turret. The only way of getting out of this nonsense position is for one of the occupants to go to Spectator then rejoin the game. Grrr!