Normally I ignore adverts along the side of a website - I accept that it's the price of websites being free and non-subscription. But this bloody thing just keeps starting up at random moments.
The first time it happened I couldn't work out where the sound was coming from as I'd scrolled lower down the page. Then I thought that I'd accidentally clicked on something. But now it's started up 3 or 4 more times without me doing anything. Aaargh!