Makes Sense
In a sense, a fire extinguisher can be a hand grenade. However, it doesn’t have a detonating device in it, so you’ll have to toss it into a fire and wait several minutes before it explodes and leaves a huge hole in the floor. Alternatively, you can use the fire extinguisher for its intended purpose and put the fire out, but where’s the fun in that?
This translation error has to be one of the most insane things we’ve ever seen, including the don’t drop your butt in toilet bowl sign from earlier. Out of all the things that go boom in this world, a fire extinguisher isn’t supposed to be one.