[1] Sloothaak competed for West Germany at the 1984 Summer Olympics in Los Angeles, where he received a bronze medal in team jumping with Farmer, and at the 1988 Summer Olympics in Seoul, where the team received a gold medal.

He participated for Germany at the 1996 Summer Olympics in Atlanta, where he won a gold medal in Team Jumping, together with Lars Nieberg, Ulrich Kirchhoff and Ludger Beerbaum.

[2] Sloothaak still holds the world record for the indoor Puissance.

In June 1991, Sloothaak jumped a record-breaking 2.40 m (7 ft 10 in) in Chaudfontaine, Belgium on the horse Optiebeurs Golo.

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