On a cold morning, a snapped spring can make the garage door seem harmless until it is lifted
https://garagespringrepair804.publishlane.com/posts/how-to-handle-a-garage-door-spring-snapping-before-work-on-a-cold-day
On a cold morning, a snapped spring can make the garage door seem harmless until it is lifted, when the missing tension becomes obvious at once.