machineguns

About 15 mins walk from me there is a forest that the army use as a firing range. If they use heavy machineguns you can sometimes hear them.
About 2 minutes walk away is a school. The kids can be heard shouting and screaming sometimes.
At lunchtime and school 'play time', if the timing is right, and I'm in my garden, you can hear this:

rat-a-tat-a-tat-a-tat!
"Aieeee!!!!!!!!!!!!!!!!!!!"

It amuses me. Especially if I'm playing battlefield 2.