I've not finished my first pen yet, but curious about the 'bonus dose' if you hard twist and break the pen mechanism and then inject with a needle as usual. Hoping a voice of experience can help. Will you just get a normal 0.6ml dose, leaving a tiny amount left in the pen? Or does the hard twist mean all the left over medication gets injected?
(I know you can extract the remaining liquid with a syringe and can see exactly how much you have - but I suspect I'm too squeamish for that!)