So you've probably been a furry too long (or arguably, just long enough) when you're coming home from a furmeet in London with your fellow dragons and are hopping on the Tube, set to take the Circle Line from Tower Hill to Euston Square, and you can absolutely swear that the loudspeaker announcement just informed you that the next train was a 'Sergal line' train to Hammersmith, and it takes you a moment to realise that no, it just said 'Circle line' and you misheard it because you're a silly furry.
Bonus points if the mix-up creates a mental image in your head like this, of a sergal riding on top of a Tube train squeeing with delight, and you go home and insist on drawing it.
It's my brain, I make no excuses. But hey, first time drawing a sergal!