When Chief Wellington warns Lincoln and Clyde not to mess with Milkshake Marty, the banana in Auntie Pam's mouth is peeled. However, when Milkshake Marty tells his fake story to Chief Wellington, the banana in Auntie Pam's mouth still has its peels on.
Lynn Sr's phone would not still work if he dropped it in the toilet.
Clyde and Lincoln would have been fined for speeding as well as driving a lawnmower on the street as it is not a street registered vehicle also neither of them have drivers licenses so they would also be fined for operating a vehicle without a license.