If you've been to asda and use their escalators or moving walkways, then you will have encountered this really stupid announcement! just you try getting a recording like this with no background noise! good luck! i did my best!.
Motor idling. Low, repetitive rumbling of a gator (utility vehicle, like a working-man's golf cart) idling outside, taken from on the tractor itself with a zoom h2 in 120* pattern.