Continuity: Episode "Cute Poison": When Veronica is having coffee with Nick, she picks up her cup to take a sip and is holding it around the rim. When the shot changes she is holding it by the handle.

Revealing: Near the end, when Michael is unscrewing the sink before kicking the wall in, watch his hands in the foreground while he is talking to Sucre. Just when Sucre says "But what you were doing up there in the infirmary." Michael starts using his fingers to take the bolt out. You can see that there is no bolt, just him turning air, with a mystery 'unscrewing' sound effect.