In the Batman/superman episode "clock king" batman and robin get out of the batmobile (after they get out of the time warp), batman looks at the big clock on a building and says "Just as I thought, we`ve lost 48 hours!" 2 slipups: How did they know they were in the future and not the past? And how did they know it was 48 hours? Clocks only contain a 24 hour time scale!