For a few brief moments, this held the distinction of the film with the biggest aquatic film set ever. Until Titanic (1997) began filming several weeks later.
When Karen kills the deputy he fires his revolver at her six times, but when Tom retrieves the gun to shoot the handcuffs there is still at least one bullet left in the empty gun.
When the armored car stalls, it is near the middle of a dip in the road. Later the water is chest deep next to the car, but when the robbers cross the water it never gets much deeper than waist depth. As the middle of the dip would be the lowest point, the water depth should have been much greater.
Electrocution powerful enough to set wet clothes on fire would cause instantaneous death. Even discounting this, the burns on Kenny's body would be far more widespread, whereas none appear to be present.