By FOX Sports staff
In one of the shocks of the season, Dortmund were handed an embarrassing defeat at the Signal Iduna Park last Saturday, despite them taking the lead in the 17th minute through Robert Lewandowski.
It took the visitors just a minute to pull level through Artjoms Rudnevs, before they went ahead 26 minutes before the half-hour mark when Son netted with a powerful effort.
Things went from bad to worse for Dortmund five minutes later when Lewandowski was sent off, and although HSV too were reduced to ten men in the 59th minute when Jeffrey Bruma received his marching orders, they went on to wrap up the win thanks to further strikes from Rudnevs and Son.
The victory was Hamburg's second of the campaign over Jurgen Klopp's charges, with the first coming last September when they ended the defending champions' 31-game unbeaten run in the league - a match that Son also starred in as he netted a brace.
Revealing he was still in disbelief that his side had managed to down Dortmund in both their meetings, Son is hopeful they can use the result as a platform to build on in their search for consistency, something that has eluded them all season long.
"It's a dream!" he said. "Beating Dortmund is something special and I would never have believed beforehand that we would manage it twice this season.
"I really don't know what to say, I'm over the moon. It's not exactly easy to win at Dortmund and obviously I'm delighted to have scored on top of that.
"I just feel happy, simple as that.
"We have to keep taking it a day and game at a time. Above all, we need to keep going full out in every match.
"If we can perform as we can and manage to do it consistently, we're capable of beating anybody in the Bundesliga."
The 20-year-old, who has netted his fair share of stunning strikes, was also quick to stress that the ferocious left-footed strike for his first goal last Saturday had not been a fluke, and believes his strike partnership with Rudnevs is looking very promising.
"That's the kind of shot I'm constantly practising," Son explained. "I've often stayed behind after training and done an awful lot of practice on it with Frank Heinemann, our assistant coach.
"I think it's all down to training that I've been able to actually score like that. All the shooting practice pays off when it gets serious.
"We [Son and Rudnevs] complement each other very well, as we showed again against Dortmund. Artjoms is a great lad as well, I certainly don't view him as a rival.
"We're happy for each other when we score. And when we both hit the net, as was the case against Dortmund, then of course we're both totally happy!"
Son joined Hamburg's academy at the age of 16 and, after making his first-team debut in 2010, has gone on to establish himself as a regular at the Imtech Arena.
Interview courtesy of the Bundesliga