Snorg Tees just sent me a design for a t-shirt, with the legend
distance raptor/time raptor = veloci raptor
(and an image of a dinosaur).
I thought it was funny and clever. But then it hit me: the raptor in the numerator and the raptor in the denominator cancel, leaving just veloci! To be mathematically correct the shirt needs to say
distance raptor/time = veloci raptor.