Alina Lova's wroclove.rb 2024 lightning talk, positioned as a short, practical complement to Maciej Rząsa's 'Debug like a scientist' talk. Walks through a real blocker at SoftSwiss: clients reported they could not upload files in their CMS, pressing the upload button did nothing, and management was stressed because the CMS could not deliver new content. Investigation notes: the issue reproduced across two different CMS applications, so likely not on their side; testers narrowed the repro to Chrome on macOS only; the product owner proposed drag-and-drop as a workaround, which worked. A very human Google query ('mac can't choose file in Chrome') surfaced the answer — adjust macOS system preferences (Chrome file-system permissions). Copied to management, confirmed by team (devs, testers, PO), total resolution in under 15 minutes. Closing lessons: a blocker differs from a normal bug; accept the stressful situation first, suggest workarounds to unblock clients, and just focus and ask every question you need to ask.