gerty, Yes, it was alone and a young curious boy, did get stung.
It was very painful, they are very fury and shiny and I was attracted immediately most children don't know "Red" means "Ouch" or "Dead"
Same thing happened when I picked up a Caterpillar once. My Family taught me about spiders but, nothing about the other little creatures.
I Managed Apartments for about 10yrs, not a lot of work involved, one day I seen a mysterious bug down in the grass. It looked harmless to me.
It had a small head, but tucked beneath the little head was his weapon, he rose his head and thing came out like a single, fang and "Wham" it stuck a proboscis deep into my index finger.
These are pictures of what it was and they are not supposed to be in Utah, I thought only in South America, they have migrated to other warm area's "Watch where you sleep"
Kissing Bug / Chagas
Edit: There is a map of locations in top left of the page, showing areas in the U.S. to be of concern.