If ToonDoo isn't loading... try this site.
http://www.readwritethink.org/files/resources/interactives/comic/
If all else fails... please just sketch (hand draw) a math cartoon and turn it in
Requirements:
1) Must be a "real world" example!
2) You must include at least 1 negative integer in your problem.
3) Your final box/frame must include the equation and answer!
4) You may only use ONE operation: addition OR subtraction