The victim definitely had a screw loose...
I literally almost ran into two timber rattlers at Port Jervis during events. One time I was warming up and came over a crest and stopped with my bottom bracket right over the coiled up rattler. I did my best long jump impression as I ejected from the bike. I grabbed a big stick to move it off the trail so it wouldn't get hit or cause any issues and it was so heavy it broke the damn stick.
Another time at PJ I was finishing one of he h2h races and there was one up by the reservoir stretched out across the last bit of trail. I swerved and just missed the head and had flashbacks the rest of the day. Cool creatures, but when you see them every instinct should tell you to stay away.