I don't think I did anything special? I was playing through the puzzle area with 3 buttons where you had to relay press E across them. I was near the bottom of the map when I shot a grapple top right out of screen to where the right island is and next thing I know my W key stopped working, even after I retract the grapple. It took a few seconds and me walking to the very bottom of the map before W key came back.