(Left to right) Delta and Outil are challenging themselves to see how long they can go without going to the bathroom. Here, they're boarding the train to somewhere and by the looks of it, they're starting to have to go bad but they're both in denial. They're hoping that they won't wet themselves on the train or that would be bad, having a custodian clean it up.

Background Vector owned by BG93-Sketches here on DA; https://www.deviantart.com/bg93-ske.....-SVG-394561438

Disclaimer: MLP and Transformers belongs to Hasbro. Delta and Outil belongs to me.