What happens when you don't check your calculations ...

Engineers are always advised to "check their math" - never assume or the bridge might fall down. So, when this engineer installed a load-bearing structure (a.k.a. Ikea hanging clothes net) from an overhead, did she do any back-of-the-envelope calculations? Build a prototype? Run an FEA model first? nooooo... and look what happened. Let that be a lesson to engineers and do-it-yourself-ers everywhere.

Moral: (besides the obvious) don't use string rated as "decorative" from the dollar bins for anything other than gift wrap.

No engineers were harmed in this experiment.