Prince Harry left one Invictus Games competitor a little shocked when the gregarious royal appeared to tweak his nipple.
Harry is known for his playful nature and when Ashley Coles pulled up his top to show the royal a tattoo on his chest he grabbed at it.
Ashley - from Tadley, Hampshire - suffered a brain injury in a car accident in 2010 which affects the right side of his body and his speech, but is focusing on the games as it keeps him motivated.
The former Army Rifleman pulled a face of mock horror as the two men shared a laugh following their encounter as the Prince cheered on the UK's seated volleyball team, who were playing a preliminary match against Afghanistan.
As Harry sat in the stands he was heckled by a group of Australians sat in front of him. And replied with a quip of his own that left everyone laughing.
The Australian asked if he wanted to take his jacket and Harry quickly shot back teasing them with: "You need to wear that and hide those little arms of yours."
The Prince watched the preliminary heats of a number of events as he toured the games' sporting venues in Orlando, Florida. The games officially begin tomorrow with a glittering opening ceremony attended by First Lady Michelle Obama and an audience of thousands.
Team UK captain David Wiseman summed up the Prince's ability to connect with servicemen and women: "He has been knocking around the last couple of days. He has a good, natural affinity with the veterans and service personnel.
"He belongs to that community and he can just rock up and whoever you are can stand there having a chat with the competitors - it's natural, it's genuine."
Harry was spotted later driving a golf buggy used to transport competitors and spectators around the Invictus sporting complex.
He looked at ease at the controls of the electric car as he arrived at a 4×4 obstacle course that challenged drivers and their co-drivers to get round penalty free.