My favorite (jungle era) earworm sample, still ever-persistent today and which cannot be unheard is the Loon II "bird" sound from the fairlight loon garden disk:

https://www.youtube.com/watch?v=grisBvgeY18

WARNING - once you hear and this you'll forever have pulled-out-of-the-moment experiences.

Edit: here's an article on that very sample - https://pitchfork.com/thepitch/474-anaconda-pacific-state-su...