The Party Time mode allows players to obtain a random weapon everytime they spawn.
This mode is unlocked by completing the "Embarassing!" achievement. You need to die by the FALLING lava during your killstreak. This is done best with Surge.
When used for a match, the player will earn 60% less experience points.
Any class can use other classes' weapons, as well any secondary weapons. Note that some combinations are excellents, while others are too dificult.