pilot error

Footage of Boeing test pilot Tex Johnson barrel-rolling the Boeing 707 prototype over Lake Washington, followed by his explanation of the stunt.

Air traffic audio of a pilot slurring and incoherent while declaring an emergency due to extreme hypoxia, with controllers at Cleveland Center struggling to understand him.

Larry Wall speaks at Google's Chicago office in 2008 about the Perl community, the language, and Perl 6. The talk touches on grammars, macros and error messages.