Citranium - Combustible Lemon Song (Titanium Cover)

Most of you might know the famous Portal quote by Cave Johnson, the boss of Aperture Sience, and that he is strictly against making lemonade. Suprisingly, when I play Aperture Tag: The Paint Gun Initiative, I had to find lots of signs, that Aperture was actually producing a lemonade named Citranium. So how is this even possible? Did Cave Johnson know this? And what does it mean to us?! What terrible secret lie behind that questions...? I personally think, Cave Johnson was addicted to lemons, as we can find a secret spot with lots of Citranium cans and a toilet in one of the test chambers. Maybe he was sitting there and throwing up the lemons while watching the test subjects suffocate in the chamber... Maybe. It might also just be a funny easter egg with no deeper meaning.