Had my share of them in my travels too with military. From sand vipers in Saudi to Boa's in the jungles of Panama and rattlers at Ft Sill and water moccasins in Kentucky and Oklahoma.
I truly believe in the lord above because, I have been right next to quite a few of these over years and I mean close without bite one and come out unscathed. From laying in the sand in Saudi and a viper pops up right next to me, to using the bathroom at Ft. Sill in the field right on a den of rattlers (fastest dumb and wipe I ever took). Did not know they were there until I began my mission and the rattling began. Must have thought it was night with the full moon and they were just about to go hunting.
Fastest dump because it scared the crap out of you.