A submarine tracks five "subjects" going down, and when they get there, one of the Decepticons is killed to give parts to Megatron. 5 -1 +1 = 5, right? No, because the sub somehow tracks "six" subjects coming up. Not only is this very basic math, this is the simplest of script errors. It could not possibly have been more than one page apart in the script. And yet Michael Bay either didn't care to notice or didn't give a fuck. "Math? Math is for pussies. My movies are about shit blowing up, man."
A fine rant on Transformers: Revenge of the Fallen. With profanity. And spoilers!