Is my physics getting old, or that can't be a temperature? There're no negative Kelvin temperatures, and the other degrees only get down to -273.15 C or -460 or -470 Fahrenheit or thereabouts.
So I must deduce this is expressing a change of temperature, Like something that was at almost 2000 degrees Fahrenheit is now in empty outer space without any heat left, or something that was at 5000 * C is now at just 2542 * C.
Alternatively it could be something badly backwards twisted 6 or 7 full turns (-42.90 radians).
So better find another pharmacy, right?
Wait, revolving doors can turn in the same direction always, just stepping on one half of the floor circle in and the other out... So it made no sense...