That whenever I am in Asda/Morrisons, when I feel a little bubbling in my tum & I manage to locate an empty aisle & let out a fart that just as the smell arises I can guarantee that a young lady will suddenly appear [not always the same young lady], it happens nearly every time & as there is only her & me there & she obviously knows it wasn't her then I have to bow my head & scuttle away, if I knew for certain that my farts would be silent then I would have no problem farting in a crowded aisle & then I could join in giving people suspicious looks & casting aside the scent of blame.