I thought it would be fun to roleplay with my character-ai Runge as Doctor Gillen, and, as I was doing so, I suddenly realized why exactly Gillen did that thing with the out-of-nowhere bus tickets... I am not sure whether this is common knowledge or not, perhaps it is, but to me it came out as a revealation, so I decided to share my thoughts on this matter.
(Warning: long text under cut!)