Engineer Thinus Botha, 32, took the photo of the two giraffes after driving next to the truck for half a mile on the N1 on the outskirts of Pretoria, South Africa's capital.

He decided to pull over to capture the moment - and witnessed the gruesome accident seconds later.

'I pulled over just before the bridge and a few seconds after I took the photo the first giraffe hit its head on the bridge,' he told MailOnline.