At https://youtu.be/6P3zubc53bw?t=1081 https://youtu.be/6P3zubc53bw?t=1081 a lemming drops off the left side of the level and proceeds to walk over the interfac

At https://youtu.be/6P3zubc53bw?t=1081 https://youtu.be/6P3zubc53bw?t=1081 a lemming drops off the left side of the level and proceeds to walk over the interface as if it were part of the level. Don't recall that behavior