ROC Man.
The ‘tradition’ of carrying underwear on the supersonic run is 100% cast iron fact. On my course one fellow did get the wrong end of the stick and wore them - he was quite the spectacle at the outbrief as his other half was quite petite. I was (sadly) a little sheepish about the practice so I took my favourite soft toy - a rather strange eel about a foot long that doubles as a board cleaner when he wasn’t being a lucky talisman.
That eel was there for everything - supersonic runs, Ops, deck landings...