Little one bonked into a glass door from what I know, and after noticing, I took the time to provide shelter and warmth until it was ready to fly away to a nearby branch - maybe 40 minutes? Enough time for me to take my work break and then a few extra to tell anyone with complaints to shove off. Just a gentle touch at the tail feathers and she walked right on.
The glass door is at an alleyway, so I don't think the bonk was very hard. Unfortunately I was on the clock, and don't have any knowledge of how to recoup birds, so I did the best I could.
Thanks for sharing, had a good little chuckle.