Just out of curiousity, what did the strange spike do in the end?
I was thinking of your phal when I went home for the holidays, because one of mine did the exact same thing (sister is keeping part of the collection for me). It started a spike in october which had started to do twisty things like yours. Well getting home last week I discovered that not only had the spike got itself jammed into a leaf (like yours) and then aborted, it also grew a new spike which did the exact same thing! I tried to free it by performing some minor leaf surgery, but it was hopelessly stuck. I ended up breaking the spike tip, which is still firmly buried in the leaf. Not even tweezers can pluck it out. I'm surprised by how strong a fragile spike tip can be!