Concerned border officials in Botswana ©Mina Choi
"I took this at the border between South Africa and Botswana after a few hours cooped up in a car. Having a chuckle at this sign after a long journey was the perfect relief, and it was a great introduction to an incredible country!
"It's good to know that customs officials do have a sense of humour. After all, they must see some interesting things every day!"