Dr. Wily Edit
Dr. Wily will drop these one at a time from the rocket flame at the bottom of his Koopa Clown Car. When they hit the ground, they cause several bursts of flame to rise up in a row of 8, with four gaps in between to stand if you got stuck in it. The flames disappear after a short while, but can be a hazard if they get close together as you move around.
On of Dracula's many attacks is to make six Fireballs rain from the ceiling, causing flames to rise up from the entire floor, except for the left and right ends, and just below the tops stairs, making it not too difficult to avoid, but the slowly falling Fireballs could get in the way while avoiding his large and fast homing attacks.