I feel your pain!
I was going hard and mashing on my Basso last week, when the stem bolt holding the handlebars in place broke and the bars rolled forward. Damn, it was scary, and it was all I could to hold on and get her stopped before I did a header over the bars. Lucky no cars were coming, because I was pretty much out-of-control. Well, after I calmed down and got my nerves back in order, I realized I was stuck and had to walk her home about 4 miles.
Saddest part was I had just put some Veloflex Masters on her and I was really enjoying the ride!