Revealing mistake: When Sonny is on the payphone, you can see Julian mouthing something to the guy on the payphone behind Adam. The guy is giving him instructions.
Revealing mistake: In the surprise party scene for Sonny at Hooters, Layla is holding a real baby and then you see her holding a baby doll. It is very obvious because there is a huge size difference between the two, and the "real" baby's head was always shown.
Revealing mistake: When Sandler is talking to the kid, they are passing through the Greenwich Village area. In the next shot, they are walking in front of a "clock building" (one side has the numbers 1-12 and 0-59). This building is located on John Street in the financial district, which is over 2 miles away.
Revealing mistake: When Sonny puts the newspaper over the puddle of milk, notice it doesn't get wet at all. Newspaper very obviously gets wet when exposed to liquids.
Answer: Maybe I'm misinterpreting the line, but I thought "big problem" in this context meant that the state would aggressively pursue criminal charges against Sonny for his actions, as in it's his big problem to deal with now.
Phaneron ★
But in that context, wouldn't it be a "big" / serious problem in any state? I can't imagine that most states would be easy-going about it. He seems to mean that it happens a lot in New York, but I might be wrong.
Other states would certainly be aggressive in that situation, but given that Mr. Brooks is an employee of the state of New York, he could just be emphasizing how much trouble Sonny is in.
Phaneron ★
Fair enough. Sonny might have thought that it was OK for him to pretend to be Kevin, since he is good friends with the real Kevin.
Mr. Brooks was being facetious by specifically saying "big problem in THIS STATE." Obviously Sonny knows what he did was very wrong and illegal. It would be like if you were driving in a different state and didn't stop at a stop sign. The cop might say "I know in your home state the stop signs are optional but here in Texas you're required to stop at the sign."