Green, I used the sand method to rescue a sparrow that had fallen in a cement block knee wall. I was heading out to the pickle barrel to drain my bladder, and when I walked by the wall, I heard some really desperate chirps coming from inside the block cells. Took awhile, but I finally spotted the little bugger at the very bottom. No way I was ever going to snake my arm down to grab him, so I looked around to see if anyone was watching and was about to swat a hole in the block to save him. Probably would have gotten me fired if I was caught. I spotted some sand and came up with the displacement idea. I poured a little sand down the hole. Poor bird initially thought I was trying to kill him, but he stepped aside while I poured more in. I swear you could see the realization come over his little eyes when he figured out what I was doing. I kept pouring, and he kept stepping up. Got him to within the top two courses of block and reached in and grabbed him. He took off like a ***** ape when I tossed him skyward. I scored the day as a win.