It can be a helpless situation watching your squad mates fight man to man in the dank, claustrophobic bowels of the Gulag.
The most common way to ‘influence’ the match is to pelt the opponent with rocks from the stands like an angry wine-drunk Roman who is seeing his gladiator bet turn sour. But there are better options for the savvy gamer.
If you want to break out of the role of pitiful bystander there are some things you can do. For example, if your squad has audio chat enabled, you can provide call outs informing your teammate as to where the enemy is located in the arena. This awareness could prompt a critical quickdraw leading to a coveted respawn for the good guys.
On that special occasion where the opposition tries to play dirty with hidden C4 or trip mine, a well-placed rock can detonate the explosive right in front of them, vaporizing the bastard without your teammate having to pull a trigger.