Batman: Arkham Knight is filled with side-missions, one of which is the Creature Of The Night mission in which you must track down a man-bat that is a little bit bigger than Batman. This thing is terrifying, especially considering that the Creature Of The Night mission starts with a man-bat jump scare when you grapple to the top of a building after reaching Miagani Island.
Once you’ve encountered this beast, he will fly away. Now comes the fun part. You need to catch him. To make the chase easier, it helps to turn on your detective vision so that you can keep track of the man-bat as he weaves in and out of buildings.
In order to catch him, you must position yourself above him at a higher elevation and then dive down from the sky, landing directly on top of him.