Choose Sandtrap as the map on forge but before you start go to game settings and find player traits and increase shield to infinite.
Then start the game and get one person with grav hammer and one person on a mongoose.
The person on the mongoose drives towards the grav hammer guy and he swings the grav hammer.
Then you get to feel like and astronaut/baseball!
You won't get hurt and if the guy with the grav hammer misses and you run him over, he won't die because of the increased shield.
Forget to increase shield and when he hits you with the grav hammer you're in a world of hurt!