A Haibun I've been working on

I've seen plenty of homeless people before. Some of them I have even become friends with in a "Hi, how are ya, here's some change," sort of way. But this one standing with against a brick building in downtown Eugene spooked me. He wasn't large or menacing. He was even relatively well kept. But when I made eye contact to offer him some change, well, his stare stopped me cold.

eyes that have been insane
for a long long time
scare me to the quick