The drop has an angle of 360°, making it a full circle--however it's clearly 180° .
And the drop really doesn't have any definitive steepness since it's an inversion.
You'd think the steepness record would go to the Screamin' Squirrels (180°), but those actually do not "drop". 180° is moving a straight horizontal direction.
Or inversions just don't count as drops.