Vinny O'Connor was hit by a ball during a live TV broadcast from Carrington.
Manchester United's final training session before they travel to Italy Wednesday's Champions League tie against Juventus.
But as he was closing his report, Marcus Rashford fired at impressively accurate ball towards him out of all 35-yards. It hit him in the back just as he was moving out of a shot.
Marcus Rashford can be seen kicking the ball towards Vinny O'Connor during his broadcast
The Sky Sports presenter was completely unaware of his impending doom as he presented
Rashford appeared to admit his guilt with a simple message on his Twitter account
As O'Connor and the cameraman scanned the group of Manchester United players for the culprit, Rashford attempted to look as inconspicuous as possible. However, with Ashley Young hysterically laughing and pointing, the game was given away.
Sky Sports appeared on the Twitter account. They wrote: 'Absolutely pinpoint! Our own Vinny O'Connor gets hit by a perfect ball at @ManUtd training! @MarcusRashford what did you do? '
Tweeted soon after, appearing to admit his guilt with a simple message of two emojis.
It showed Manchester United were in fine spirits ahead of what could prove to be a crucial Champions League Group tie against Serie A champions Juventus. In the first leg, another defeat would see the spot in the group move out of reach.
The ball hits the Sky Sports presenter in the back just as he is walking out of the shot
Rashford hides behind goalkeeper David de Gea
Rashford fails to look inconspicuous as the cameraman points at his guilty-looking face
Should Valencia beat Young Boys in the group's other game, they would slip to third place with just two games remaining. Crash out of the Champions League and into the Europa League would be a significant failure for Jose Mourinho's side.
Rashford could be a last-minute winner on Saturday in the match against Bournemouth. Mourinho, but put on an important cameo at the Vitality Stadium.
It was also noted that Romelu Lukaku, who missed the game against the Cherries through an unspecified injury, failed to train with the team on Tuesday and is set to miss the game in Turin.
Even if he was fit, he would struggle to get a berth after a spell of poor form in front of goal. The Belgian has struck four times this season, but has not hit the net since September.
Rashford scored the winning goal for Manchester United against Bournemouth on Saturday