Stupid questions thread

[Embolism]

This might not be a stupid question.

Why is there NO2 in the armory?

For room suppression, e.g. some rude dude is holding MedBay hostage. Fill Medbay with N2O and knock everyone out.

In practice I've never seen N2O used for "legitimate" purposes, and for traitoring most people use CO2 which is less obvious/more effective.