In the 43rd minute he reached a cross from Jonathan dos Santos in the box and did a karate kick movement to sent the ball flying in, a stunning and curious volley.
Ibrahimovic's goal was greeted by a standing ovation from the opposition fans but the Swede dismissed the gesture as a run of the mill response to his customary brilliance.
"He thinks he is the philosopher of football", Ibrahimovic is quoted as saying of the former Roma midfielder by MLS after the game. He has 17 goals and eight assists in 22 appearances with the Galaxy. "It reminds me of a goal I did in Ajax", said Ibrahimovic, who has five game winners for Los Angeles.
Galaxy were 3-0 down at the time but his goal sparked a comeback as they drew level before finally losing 5-3.
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Electricity remained out for much of the city, with power lines lying across many roads like wet strands of spaghetti. The remnants of Florence are expected to hit the peaks of western North Carolina in a couple of days.
After starting his career at Malmo in Sweden, Ibrahimovic has gone on to score goals for Dutch giants Ajax, Juventus, Inter, Barcelona, AC Milan, Paris Saint-Germain and United. I was just trying to hit the goal and it went in.
Ibrahimovic, who scored to reduce Toronto's lead to 3-1 before half-time, joined Juventus forward Cristiano Ronaldo and Barcelona's Lionel Messi as the third active player to score 500 goals between club and country.
Speaking after the clash, he said: "I was close to the goal". In doing this, Zlatan, known for scoring the most outrageous goals, added one more to his collection.