Ahh corporate marketing. I won't say anything negative.. I'll let you use your own judgement!

Symantec In the House!
Checkpoint Corporate Song?!
Symantec Norton Fighter!
Cisco Career Makeover Crew!
Even individual people aren't immune to acting silly. Security Firm Marketing Director in the UK
Apple Talent Show?!

And just for good measure This Video. It's not marketing related at all, but still funny as hell.