Other mistake: Robin says she burned the dinner because she mistook the temperature scale on the oven for Celsius. However a given temperature above -40 is always higher in Fahrenheit, so by assuming the oven to be labeled in Celsius she would have undercooked the food. For example: If the directions were to cook at 400°F, she would set it around 200°F (thinking the oven was Celsius.) If the instructions were to cook at 200°C, she would still set the oven to 200°F, undercooking the food in both cases.
Tanngrisnir
17th May 2013
How I Met Your Mother (2005)
1st Apr 2013
National Treasure: Book of Secrets (2007)
Other mistake: During the car chase in London, when Ben almost hits the dogs, we see one dog running up to the car and licking the backup-camera. However since the camera is actually mounted above the license plate, it's impossible to reach for a dog this size.
4th Jun 2010
Stargate SG-1 (1997)
Other mistake: Several times, especially in the first season, there is an IDC confirmation on the SGC computer even before the wormhole has been established.