We have a screened porch off our bedroom, which is on the back of the house overlooking our brook, and have a 300W halogen lamp that we turn on at night while we sit on the porch. The light attracts tons of bugs, mainly moths, but sometimes a few bats. We also have the opportunity to see deer and other wildlife in the woods on the far side of the brook.
One evening last summer, we were in the house, and I looked down the open area inside the front of our house, and our two cats were acting very "mousey". Suddenly, our 22 lb yellow tiger cat leaped into the air, trying to grab the mouse, a mouse with wings

!!!! It (the bat, not the cat) (with that little rhyme, I feel like Dr. Seuss

) flitted along the ceiling area, and while I went in search of my wood stove gloves and a broom, the bat disappeared from sight. We looked and looked, and couldn't see it, but the cats were both staring up at some dark brown paneling in a corner. The bat was almost perfectly camoflauged against the panelling. Now, I am terribly right handed, and the only way I could swing the broom to try to take down the bat was to swing left handed. Taking a deep breath, and putting on my best David Ortiz swing, I caught the bat squarely with my sweep broom, scooped it up before the cats could get to it, and took it outside. The next morning it was gone, so it was either stunned, or became a vital link in another animal's food chain.
Only bat we have ever seen in the house, and not really sure how it got in. I only wish I had video of the cats reaction to the mouse that flies!