Visible crew/equipment: When T.J. is playing basketball in the garage, before the helicopter scene, you can see the boom mic fly across the top of the screen for about 2 seconds.
Book Smart - S2-E8
Continuity mistake: The word "Puritans" is written differently on the chalkboard between shots, in the scene where T.J. is discussing Puritans with Mr. Delk.
Continuity mistake: When TJ records his messages for when his dad comes up to talk, he says "You're right, I just need to sleep on it". When Marcus plays the tape, TJ's voice says "You're right dad, I just need to sleep on it".
Other mistake: When T.J. types in his height instead of Floyd's while searching for his dad's date on the computer, he never pressed the "Enter" key.
Other mistake: In the beginning of the episode the Chem teacher tells the principal he can't take over for the other teacher's 5th period because that's his only free period but T.J. later on during the trial says Mo probably left his playbook during 5th period. (00:03:17 - 00:12:26)
Book Smart - S2-E8
Visible crew/equipment: When Floyd and TJ are talking in the kitchen after the girls leave, a boom mike can be seen at the top of the screen.
Working Guy - S2-E2
Revealing mistake: When Yvette and Floyd are playing basketball, the guys come home and distract him. Yvette makes some impressive shots, and you can tell that it's a stunt double because the hair is totally different. Yvette's is big and puffy, and the double's is long and straight. (00:08:15 - 00:09:40)
Answer: It's reckless and irresponsible and it's not something that he does normally. But, it is something that Marcus would do.