David Thorne didn't have the $233.95 to pay an overdue account. So what did he do? What any other budding young genius would do, he submitted a picture of a spider he drew instead. Unfortunately, Jane Gilles, who is clearly a moron to the nth degree, wouldn't accept it. So what happened next? Click the spoiler tag to find out. But I'll give you a hint: time travel! And also, David's account not getting paid.

*CAUTION: The image is huge, so I spoiler tagged it.*

[Copy-pasted from another site, and slightly edited to be BZP-friendly]