It's about time we had a thread on people doing dumb/funny/unexpected shit to accomplish stuff in Human Revolution. I already seen someone on these boards using stacked mines to one shot he first boss. Hoping for this to be a repository of our shenanigans.
Here's my addition:
In Picus building while waiting for the Funicular and guards streaming in I reloaded just before starting the sequence and used 2 vending machines to block of one entry and then a heavy crate to block the closed door in. So instead of fighting anyone I just stood in one place smoking a ciggie waiting for the Funicular to get there, since enemies couldn't get into the room :D