Klich scored the third in a 3-0 rout of LA Galaxy in their MLS clash over the weekend.
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Former Aston Villa and Crystal Palace striker Christian Benteke and Cristian Dajome were also on the score sheet.
Klich joined up with Wayne Rooney's DC United in January after leaving Leeds.
It was the second goal he has scored for his MLS club and he decided to pull out the infamous Rooney knockout celebration.
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He ran to the corner to celebrate, mimicked several punches and then fell to the floor backwards.
Rooney did the exact same celebration while at Manchester United back in the 2014/15 season.
It came after a video surfaced of him jokingly sparring with former Everton defender Phil Bardsley and getting 'knocked out'.
The celebration was in response to the video making national headline news.
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Later explaining the incident, Rooney said: "After I went down, the video stops but I wasn't knocked out. We got up and carried on.
"I remember when we finished and the two of us sat there. My nose had gone and Bardo had blooding pouring out of his mouth. We were both looking at each other, saying: 'what are we doing?' But Bardo (Bardsley) is the same.
"He was brought up in Manchester the same way I have in Liverpool. We both love boxing.
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"I remember when it was coming out, I remember going in to see [Louis] van Gaal. He was the manager at the time.
"I said, 'listen, this story is coming out about me and Phil Bardsley boxing in the house' and he found it hilarious!
"Growing up, I remember my dad used to give us the gloves in the house. It is something I have always loved doing.
"The night with Bardo, we got home and we put the gloves on. It is something that we do quite regularly - but that one got out."