A sharp cold snap sweeping across Florida has brought with it one of the state’s most unusual winter sights: iguanas dropping from trees as temperatures plunge well below their comfort zone. The phenomenon, which tends to resurface whenever Arctic air pushes deep into the peninsula, has once again captured attention as residents woke to frigid mornings and immobilized reptiles scattered on sidewalks, lawns and roads. As a strong cold front moved through the state late Thursday into Friday,