if you don’t press the button correctly you have to pay £1000. that’s a lot of money. you’ll probably find that most tube trains stop at the station anyway.
it’s only the emergency trains which don’t stop which is why you need a special button. probably.
this coin was glued to the floor of the train to henley using the old glue-a-coin-to-the-floor trick. normally this trick involves a 50 pence piece. this being henley it was a nice round pound.