There's construction somewhere near work. From high on the train platform, I can see part of the tall, tall crane. There must be some kind of heavy hammer attached, going tick tick BOOOMMM tick tick BOOOOMM.
I keep waiting for the electric guitar to kick in, and I KNOW it's not a concert. Still. Really great drummer there, guys!
http://www.doempie.co.za/hiringgallery/Hydraulic%20Hammerlarge.jpg