The moment I found out my wall plates were hiding a bigger problem
I was finishing up a 3 outlet job in Boise when the homeowner asked why her wifi kept dropping in the back bedroom, and it turned out a coax staple had nicked the shielding on my very first run 2 hours earlier. I'd been so focused on speed that I stopped checking continuity before closing up, and one $8 tester would have caught it. Now I'm wondering how many callbacks I've created over the past 6 weeks that I blamed on the router.