Consider this situation:
You are working on what seems like a normal day at the office.
Suddenly, iron shutters that you never seen before cover the windows. You hear the saw guy's voice come through everyone speaker phones and PC. He informs everyone that only one person gets to leave work alive today at the end of the day. If there is more than one alive, nobody survives.
Spoilers there has also rabid wayward cats released into the office. One may or may not have red glowing eyes.
The power goes goes out, its pitch black, and within seconds you hear a blood curdling scream of someone getting murdered.
What do you have at your desk that you use to defend yourself while cowering in the corner?
A horned Viking helmet. I know it's not historically accurate, but it's made of real metal and real horn and it serves as both defense (head protection) and offence (goring attackers headfirst like an angry bull).