Enter "Saltatio" into the plate key-maker in the crypt, then use it on the golem there. See what happens.
Hewie's comments on the hard difficulty are quite hilarious. Fiona's comments and remarks can make you smile too.
Ending C. After Fiona and Hewie leave the castle, you get treated to a cutscene where Lorenzo wheels towards the front door on his wheelchair, screaming Fiona's name, and toppling down the stairs with a squawk. He then lies pathetically on the floor, begging Fiona to come back. Take that, you old bastard!