Only one word could have described the scene in the arena, chaos. Arnold had been in his fair share of battles, but the one he was seeing now even took him by surprise. People were being shot down like crazy. None of the attacks was getting wasted thanks to the overwhelming crowd. Even if someone managed to dodge an attack, it only went ahead and killed or hurt someone else.
On top of that, since no one could predict which direction they will end up getting attacked from, most of them couldn't even defend themselves. Initially, Arnold had been worried about Nicole and Johnny for the same reason as they seemed to have been targeted since the battle royale started.