Mines detection radius through HON floor

[djlaptop]

This is tough to describe so I made a video:

Basically, if the HON is mined at the side windows (to prevent infantry from jumping in from the stairs), those mines will blow if a character runs on the bottom level of the HON as well. IMHO, the mines should not detect an enemy through the floor. I've been bit by this in-game, wondering where the mines were that I couldn't see.