By Simon Stone BBC Sport at Cardiff City Stadium 22 Dec From the section Man Utd Share this with Digg Facebook Google LinkedIn Reddit StumbleUpon Twitter Copy this link https://www.bbc.co.uk/sport/football/46662863 Read more about sharing. Even Ole Gunnar Solskjaer couldn’t quite believe it.As Marcus Rashford’s third-minute free-kick whistled past goalkeeper Neil Etheridge and into the corner of the Cardiff net, Solskjaer’s initial reaction was ‘wow’.After that, reality took hold. Manchester United’s newly installed interim manager clenched his fists and turned to hug Mike Phelan – a man, like Solskjaer, who is a blast from Sir Alex Ferguson’s past, restored to the assistant manager’s role he vacated when David Moyes arrived in 2013 and cleaned out his illustrious predecessor’s entire backroom team.It was the prelude to a quite amazing evening for the 45-year-old Norwegian at Cardiff City Stadium.In one game, he has achieved something Moyes, Louis van Gaal and Jose Mourinho couldn’t do between them in almost five and a half seasons – he managed a United team that scored five times in a Premier League game.And it was the first time a Solskjaer team had scored five in this stadium, even though he spent nine months here as Cardiff’s manager in…