Don't think it was a .45,maybe a couple of years ago this was going around .It seems to me it was a guy that rested his .410 on his shoe and it went off. That is unless this is a senior moment .
could well have been ,looked like a bullet hole anyway and whatever delivered the payload ,I'm sure it stung for awhile...
yup shotgun! I recall doing a "similar thing", but with a BB gun! That hurt enough I never put another barrel on my shoe, or near my foot again!