Mozambique is one of only two UN countries to have weaponry on its flag. It features an AK-47 assault rifle. In case you're wondering, the other country is Guatemala, which has two muskets on its flag.
The fishing technique attempted (badly) by Jeremy, Richard and James is called drift netting. It's actually quite simple, but then so are Jeremy, Richard and James.
James May estimated that his Mercedes would weigh an extra 700 kilos when full of water. James might not have known that the official maximum load capacity of the 200T is 560 kilos.
James May's curse on Jeremy Clarkson refers to bilharzia, also known as schistosomiasis, which is an infection caused by a parasitic worm that live in the fresh water of tropical and subtropical regions. Bilharzia can damage the kidneys, liver and bladder. It is not generally known to affect the "ballsack".