Because the larvae in the cheese can launch themselves distances up to 15 centimetres (6 in) when disturbed, diners hold their hands above the sandwich to prevent the maggots from leaping.
“Hey, I had an idea for a cheese that’s been pre-digested by maggots”
“That sounds awful”
“No no, wait, I didn’t get to the best part - you gotta protect your face while you’re eating it or the maggots might jump on you”
“Hey, I had an idea for a cheese that’s been pre-digested by maggots”
“That sounds awful”
“No no, wait, I didn’t get to the best part - you gotta protect your face while you’re eating it or the maggots might jump on you”
If the maggots aren’t jumping, it’s considered to have gone off, iirc.