Other mistake: When Michael climbs up the rope to get to the room below the infirmary, the rope is hanging from the manhole cover, but he still manages to lift the cover whilst hanging from it. In the next shot where he looks down the manhole, its clear that there is nothing other than the rope he could have held on to while lifting the cover. An impressive accomplishment, defying the laws of gravity. (00:38:00)
Trivia: S4E11: (spoiler) The Scylla alarm on the General's computer is visible on screen for a second or two. Below the flashing word 'alarm', it says it is in section AA-23. That's also the designation of the prison block where Princess Leia is being held in Star Wars. This was certainly done intentionally, but is also easy to miss.