When Piper puts Chris down to change him, his head is bare. Then when she exclaims "wow!" he has a blue beanie on. She then picks him up, his head is bare once again, then when the shot switches from Phoebe to Piper as she puts him down in his crib, his beanie is on his head once again.
When Drake thinks he is Robin Hood, he yells: "Stand and deliver!" This is a catchphrase famously attributed to Dick Turpin, the legendary highwayman. Not Robin Hood.
When Drake holds up the money truck, he is only armed with a bow and arrow and he is not aiming it at anyone, yet the armed guards with guns are standing with their hands in the air letting him rob the truck.