Grenade Hot Potato: During Acid Test, when the Combine can't directly shoot at your cart, they'll just lob grenades over the barrier instead.Luckily, My Luxgard Will Protect Me: The player uses sheets of bulletproof glass as their only defence against Combine firearms.Whirly's official designation: The EVacuation Improvised Self-Constructed Rotary-Action Tactical Offensive Razor, or EVISCRATOR. Chapter 2 of the mod, Acid Test, takes place at the Waster Transfer Facility, or 'WTF' for short.