I have been GMing 'The Poisoned Chalice' solo for Charlie - he had a group of 5 PCs all based on SG1. As I know the plot and NPCs well it was easy enough to ad lib without straying to far. One PC went off alone at night after a werewolf and got ripped apart. That doesn't happen to often and it reduced Charlie to a very rare ( for him) swear word. Those dice hated him - the number of critical fumbles he got was statistically unbelievable.
Gotta love those dice!
I've been extracting a short adventure as a solo from the rambling, self-indulgent 'Missing Inaction' - a barge trip on the underground canals to rustic Vulgaria, a place ripe for revolution. It looks like being about 100 paragraphs long and I shall endeavour to make it more robust and less frivolous.
Horror of horrors - I found that I never wrote paragraph 2012 for 'Missing' and will have do a revision and have an errata slip.