I had that happen to me one night when I wandered down to the riverside to get some photos. I smashed my tripod to hell and back, and the camera itself snapped the tripod head from the impact. Luckily the camera was unharmed (and I wound up with photographic evidence of the spill to boot). I went down the next day and found the pieces of the tripod I couldn't find in the dark the night before - it was a complete loss (luckily it was a cheap Walmart tripod so I only lost about $30 in the mishap).
I'm really lucky I had the older, tougher primes in my bag because that made a nice, lobbing overhead arc before landing in a snowbank.
EDIT: Yes, this is a 13mm shot. Needless to say my mind was focused on saving the Sigma from destruction over everything else (including me) at the time.