Suprapto was involved in a car crash in 2006 at Sentul during the Asian Formula Three Championship when he drove into the rear of James Winslow. Winslow's car was damaged and he was pushed off onto the gravel, but Suprapto's car rolled with the impact, landing on its side. Winslow left his car to investigate Suprapto's condition and found him trapped in the car, with a broken fuel line spilling gasoline. Familiar with the car because he had previously driven it himself, Winslow turned off the fuel line and managed to dislodge Suprapto so that the pair could flee immediately before the car "burst into flames".
Neither Suprapto nor Winslow was injured. Winslow finished and won the race in a spare car, while Suprapto was given a precautionary checkup at a nearby hospital. Suprapto later said of the incident, "I ran into the back of James and the next thing I knew I was looking directly up at the sky. Then I heard James shouting at me. I owe my life to James because I was trapped in my car."
Racing achievements 
|1996||Formula Cadet||5 Novice Race Win|
|1997||Formula Cadet||Competed in Super One Championship|
|1998||Formula Cadet||12th MSA British Championship|
|1999||Formula Cadet||5th MSA British Championship|
|2000||Formula Junior||1st British National ABkC Super One Championship 3rd Champions of the Future|
|2001||Formula Junior KTM||6th British National ABkC Super One Championship|
|2002||Junior Rotax Max UK||1st British National ABkC Super One Champion|
|2003||Formula Renault UK||Winter Series|
|ZIP Formula||4th MSA British Zip Formula Championship|
|Jordan Cup||Vice Champion|
|Junior Rotax Max UK||PFI Winter Series Champion|
|2004||Formula BMW Asia||Winner Shanghai GP|
|2005||Asian Formula 3||Promotion Class Champion|
|2006||Asian Formula 3 & A1 Grand Prix||reserve driver for A1 Team Indonesia|
- page 18, Autosport magazine - 28 September 2006
- "Accidental Heroes". BBC. 25 Sep 2008. Retrieved 31 Aug 2012.