That's nice of someone to go out of their way to leave them a little gift. It surprises me that people would actually leave notes on an ambulance complaining they're blocking. Weird.

Maybe in 50 years time every ambulance will have a QR code on the windscreen that a passer-by can use to tip any amount in cryptocurrency of their choice, using the memo field to leave a nice virtual note.

Ha ha, that's funny. Could be. I wonder if they'll have a "tap to pay" option for when you board the ambulance. Maybe you could pay for your pizza with Bitcoin and get it delivered to the ambulance. Ok, now I'm just being silly.