Not me, but the example that Wes and Spoo et al set gives me enough encouragement to think that if I were ever to lose my job, I could step it up and make enough to at least keep us off the streets. Maybe I could even make more than I am at my current job, but there's no way to know that unless I tried it, which I don't have the guts to do. And, long-run, my prospects are probably better in my current career.
This happened to me. I've been in sales for a long time. During the great slow-down, things got... slow. My income dropped to nearly nothing. I wasn't making enough money to cover the cost of gas, let alone my living expenses. I quit, and out of desperation, a new hobby and business were born. After a couple of months I started making better money than before things got rough.
I did it full time for a little over two years. I flipped everything I could get my hands on- furniture, electronics, clothes, bicycles, etc.
I've since moved on to other ventures but I look back on those days fondly.