Retconning Crocodile (The Beginner's Guide to Multiversal Theory)
From Jenny Everywhere Wiki
A Retconning Crocodile once used the Time Sewers to get to a verdant countryside, where the presence of the manhole startled a Gnome. However, the Gnome was unable to deduce the manhole's provenance, as the cackling Crocodile had already retreated back into the Time Sewers. Doctor Sigma used this anecdote as an example when covering the Time Sewers as part of a lecture on the nature of the Multiverse and common ways to travel through it. (COMIC: The Beginner's Guide to Multiversal Theory)