Did you ever try to temporarily put a hummer feeder just outside the garage door?
Just had the one feeder next to the seed feeders in the backyard and it stays very busy all summer.
There is a flowerbed just outside the garage door along the driveway with plants the butterflies and hummingbirds like, so, if it was going to happen, I guess it was going to happen sooner or later and likely will again.
Maybe the hummingbird got into some of the same stuff that messes up the honeybees so bad? Or maybe it got into some fermented nectar and was just plastered and fascinated by the ceiling plaster until it collapsed and died like with an OD? I dunno...just weird that it happens and I don't want it happening in my garage. I like the little guys.
Perhaps a long handled minnow net would work to safely capture a ceiling trapped hummer? Their wings are moving so fast, I think they'd be easily damaged if they got hit. I don't want to kill or maim them while trying to save them.