Any Windows update:

By @MaxDeMooij
When I try to help R&D solve a bug

by Avner
When the PO starts giving you feedback on another designer’s wires

from an Anonymous UXer
Colleague: “If I was the user, I would…”

by @MaxdeMooij
When I discover a bug right after going live

by Max
When I prove the other senior designers wrong

By Max
Presenting after the 5th round of revisions

by @gschauz
When a dev asks for feedback on their indecipherable balsamiq wireframes:

by Anonymous
When a dev asks for a mock for copy change:

by @hanbyulru
Developers during code reviews:

by Robin