I'm guessing, if your arms were cut off in some tragic accident, your first thought probably would not be to scrape your gums against the sidewalk in order to create a comic strip with your own blood.
But, this fantastically disturbing quote from cartoonist, Ivan Brunetti, is a valuable lesson in visual thinking and hardworking pictures for two reasons. First, it reminds us that, while we might not consider pictures to be our own mother-tongue - it is for some.
When it comes to visuals most of us are more literate than we are articulate - happy to process information in visual form, but a little less comfortable with expressing our own ideas that way. But, in every classroom and every place of work, there will be people at either extreme of the visual/verbal spectrum, and everywhere in between. And, as a result, effective communication demands pictures.
We also love this quote because we know the image of a bloody-mouthed, bobble-hatted cartoonist, scraping their message on the pavement won't be easily forgotten. And that, in itself, is proof of the power of visual thinking.