Worst module you've ever seen?

[Batcathat]

"The first time you drink from the fountain, gain 2 Str. The second time, lose 3 Str. The third time, gain 4 Str. The fourth time, die."

I must admit, that one sounds kinda fun, if only by virtue of how it screws with PCs trying to figure it out. My appreciation is more in the abstract though, I'm sure it'd annoy me as a player and I don't think it'd dare use it as a GM.