Watching this happen makes me think it's a bigger problem everywhere. I mean, people keep trying to skip steps that seem slow or old-fashioned, just to save a little time now. But those steps exist for a reason, like your foreman's pre-heat rule. You end up wasting way more time later fixing the cracks, or worse. It feels like we keep having to learn the same lesson over and over. Maybe it's just me but that extra hour of setup seems pretty cheap compared to a failed test.

Grab a pack of those 3M Command picture hanging strips. They're a game changer for renters or if you're worried about hitting a stud or pipe. I put up a whole gallery wall with them last weekend. For a heavy frame, use a proper anchor and a nail, but for most stuff, those strips are foolproof and leave no marks. Saves you the cash and the hassle of finding a stud.