in reply to Little Perl Mysteries: what's your answer?

Perl 5.8.0 linux-thread-multi croaks with a spoiler 
Constant subroutine main::foo redefined at -e line 1.

[download]
Serves you right for obfuscating :-) 
-- 
Joost       downtime n. The period during which a system
            is error-free and immune from user input.

[download]

In Section Meditations