By Daily Mail Reporter
You're dead: Harry jokingly aims his fingers at his future cousin-in-law Mike Tindall (far right) as the pair larked about before the Prince took to the polo pitch
He has no doubt become a dab hand at handling firearms thanks to his training in the armed forces.
So one might wonder exactly what Prince Harry was saying to Mike Tindall as he jokingly cocked his 'finger gun' and aimed it at his future cousin-in-law's head.
Was the Prince was giving the England rugby captain pointers on how to face down the enemy in a conflict situation? Or maybe the 'threatening' gesture was to do with the fact Harry's on-off girlfriend, Chelsy Davy, has not be invited to the wedding of 32-year-old Tindall to Zara Phillips.
Back orf Windsor: A friend intervenes after Harry's mock threat... and Tindall (in the black and pink t-shirt) is seen laughing
Perhaps he was cautioning the newest recruit to the Royal Family over his hedonistic antics on his booze-soaked stag-do in Florida last week.
After all, the series of outrageous photographs which surfaced of Tindall downing beer, dancing with women and - at one point - wearing a tutu, might not have impressed his future grandmother-in-law, The Queen.
But whatever the motive behind Harry's joke gesture, Tindall laughed it off in what was clearly an afternoon of horse play - on and off the polo field.
Tomfoolery: The England captain is seen tussling on the ground with the polo-playing Prince
Horse play: Zara Phillips and Mike Tindall were seen larking about at Harry's polo match, ahead of their pending nuptials
Making the most of his time before he is sent to fight in Afghanistan next year, Harry spent the afternoon joking with friends and, at one point, was seen wrestling with Tindall on the ground.
The young royals, including Tindall's bride-to-be Zara Phillips, had gathered at the Bernard Weathrill Charity Cup at Beaufort Polo Club in Gloucestershire to watch Harry once again display his athletic prowess.
The prince took to the polo field in front of a crowd including Girls Aloud star Sarah Harding, former X Factor contestant Diana Vickers and pop star George Craig, from One Night Only.
Horsing around: Harry showed off his athletic prowess during the Bernard Weatherill Charity Cup polo match
A touch of glamour: Girls Aloud singer Sarah Harding (left) and former X Factor contestant Diana Vickers were among the spectators. Vickers was also spotted smooching her current squeeze George Craig
Good cause: The match helped raise money for the Henry van Straubenzee Memorial Fund and the Royal Marsden Cancer Campaign
Prince Harry's team lost but he was praised by England polo player Mark Tomlinson for scoring 'an amazing under-the-net goal from a hugely acute angle'.
The match helped raise funds for the Henry van Straubenzee Memorial Fund and the Royal Marsden Cancer Campaign - which Harry and his brother Prince William, the Duke of Cambridge, are both patrons of.
Money was also raised for the Royal Marsden Hospital, of which the Duke of Cambridge is president.
What would Granny say? Mike Tindall dances with a woman on his stag do. He then put on her tutu
The Prince of polo: Harry chats with his cousin Zara, her groom Mike Tindall and friends in between play