Lol, I did that once. Except as I was placing it I was having my other blockhead do something, so then I saw her (the one that placed the steel lantern) get hurt and I was like “WHAT! Agh!”
Of course, it’s pretty difficult to survive an encounter with one undamaged anyway.
Edit: just found another one! I’ve been finding at least one a day so far this week (when I started looking more).