T-Rex: I've invented a cool new office product.
T-Rex: It's like Blu-Tack, except it doesn't stick to anything!
Utahraptor: What use is that?
T-Rex: You know how sometimes Blu-Tack is tough to get off? Never happens with Teflon-Tack!
Utahraptor: Hmm. No. I think I'll stick to Blu-Tack.
T-Rex: Naah. That'll never take off.
The author writes:
While writing this comic we argued over whether it was Blu-Tac or Blu-Tak. We had to resort to looking it up, only to discover that we'd flipped into some weird alternate "Berenstain Bears" universe where it seems to have always been Blu-Tack.