Amusement rides a little too realistic

About 10 years ago, I went on vacation to Disney World. Prior to leaving, a surgeon examined my knee, which had spontaneously bled from time to time since my car accident in 1988. He determined that surgery was required, but in order to avoid missing the trip, he cauterized the wound so that it wouldn't bleed.

Rather than bleeding, a disgusting bubble of blood formed on my knee which I subsequently referred to as the alien. This turned out to be far worse that the small, occasionally...