An article in today's Orange County Register answers that question. Entitled 10 weirdest Orange County Claims to Fame, one of the entries is Harrison Ford's explanation for how he got the scar on his chin.
From the article...
In 1989, Harrison Ford described how he got his trademark chin scar to Women's Wear Daily: "I was working as a buyer in knickknacks and oil paintings for Bullock's department store in Santa Ana, and I was on my way to work and crashed my car into a telephone pole."
The accident happened on Laguna Canyon Road in Laguna Beach (Orange County).
Rebelscum Breast Cancer Awareness Charity Patch Posted By Philip on November 25, 2014: Thanks to everybody that ordered patches. I sent a check for $1,600.00 to the National Breast Cancer Foundation on Monday. While it's not as much as I hoped for, it's still very much appreciated. They will remain for sale in the store for anybody that still wishes to purchase them. Details after the jump.