When his tower was high enough that he could touch his upraised elbow to the ceiling, he went all the way down to the bottom and climbed all the way back up to the top carrying a long stone roughly the size of his leg.

NEWYORKER: Ziggurat

Cpl Paul Mather, 28, from St Helens in Merseyside, was left with a hole "the size of a fist" in his leg after shrapnel ripped into his limbs.

BBC: Soldier survives grenade blasts

Every shape and size is heading for the beach, where we start our swim leg by diving into the waves.

FORBES: Connect