Factual error: When Derek is calculating how much explosive Mentos to put in Cody's mouth to get the microchip out, he says to himself, "a thousand nanograms equals 1 microgram". While this measurement is correct, it is highly unlikely that any explosive would be of use in even milligram quantities. So 1/1000 of a milligram (a microgram) would be virtually useless, and measurements of 1/1,000,000 of a milligram (a nanogram) would be even less than useless. He couldn't have been calculating explosives in such small quantities. As well, Mentos mints are about 37.5 g (http://home.socal.rr.com/mentosfaq/candies.html), and he then cuts it into approximately 1/8 - micrograms would measure 1/250 of a mint, and nanograms would be 1/2500 of a mint. (01:12:30)
Factual error: When the dog is playing the piano, his paws aren't even close to the correct locations for the music being played.