Glad to read it was not a huge crash.

Only this year, in bike tour, someone mentioned to me that if you drop the chain, you have a chance of recovering without stopping: stop pedaling forward, very gently backpedal a little bit, shift back to were you were before dropping the chain, pedal forward slowly and gently. This has worked twice for me, once going uphill -- the key in both cases was not too panic. It may not work every time, but it is worth a try.