I once was asked by a Muslim about Halal meat at the certain butchery. I warned him that it was cut with the same equipment as the treif stuff, and he ended up not buying it. I later found out that Muslims don’t have a concept of “Halal Equipment” like us. So, I inadvertently talked him into observing a weird Kosher-Halal creole halachah.
He later went on to convert and become a Chassidishe guy.
…OK, just kidding about that last part. The first part actually happened though.