A wren got into the stairwell of my block of flats. I tried to catch it, but it kept flying away. Then it flew into a window and stunned itself. I picked her up and took it into the back garden (actually scrubland) and placed it on a slab of concrete. It rolled over on its back and stuck it's legs in the air. I thought that wasn't good, so I tried to put it on a cut down branch, which I thought she might find easier to stand on. It flew about a yard, then his under the woodpile. I hope she's feeling better now. Will check under the woodpile when I get home.
Edit: checked under the woodpile when I got home. It wasn't there. I knew I should have taken a photo.