A rare radioactive gas that, when inhaled, makes someone a super-accomplished singer, just
like how Peter Parker's radioactive
spider-bite gave him Spider-Man's
amazing powers.
John claims to be a great vocalist due to his having breathed Trittium, but In reality he's a
moron who can't even sing on-
key, so I think that --- if anything --- he
may have breathed a healthy dose of "twittium" while he was growing up.