England captain Alastair Cook had to leave the field after being hit in the groin while diving for a catch in the slips.
Australia's Steve Smith edged a James Anderson delivery, but unfortunately for Cook, it pulled up short and caught him with a low blow while he was diving down.
His teammate Joe Root was first on the scene and saw the funny side as Cook rolled around on the floor in pain.
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Cook tried to carry on, but he eventually succumbed to the pain and headed off to the changing rooms for what we can only assume was a treatment of an ice pack and a sit down.
He returned to the field just before the tea break and was the subject of jokes from the commentary team.
"What's the treatment? A pack of ice?" asked Ian Botham in the commentary box.
"I think meditation is the only thing," replied former England captain David Gower.
Australia finished the day 264-5, trailing England's first innings score by 166 runs.
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