Here's what happened: I deleted your production database when I shouldn't have.

Have I worked with you before?

Look at all the pretty green check marks!

My favourite (that I saw a human do) was asserting on unconstrained mocks with a typo (so they always asserted true)

Hundreds of tests. Not exactly pointless as they did call the code so maybe caught some issues. But we fixed the typo and barely half of them passed.

No idea how the software worked, but it did.