I don't think it was a line short. My experiences with 110v tells me that if it was a high power line with possibly hundreds of thousands of volts we would be reading about this in the Safety and Advocacy forum with a thread title like "Cyclist killed by power lines!!!"
I don't see anyway that you could have gotten shocked by the lines and still be alive (or be conscious anyway). The only thing I can think is static or you were tazered (I assume you would know if you were so that doesn't work). I just don't know what else could do that.