Michael Schwern, you have made my morning.
Updated WWW:Mechanize this AM and decided to install some of the other modules it mentions during the testing phase but doesn't outright require.
Having seen Tcl's uplevel() in the past, I was curious, so I went to perldoc Sub::Uplevel, and was greeted by some rather humorous content, like:
If this code frightens you you should not use this module.
Those who do not learn from HISTORY are doomed to repeat it.
The lesson here is simple: Don't sit next to a Tcl programmer at the dinner table.
In a word: "heh"