Half his left palm was nearly chopped off in the attack by a group of men just before midnight.
The then full-time national serviceman had multiple injuries, including slash wounds on his neck, face and body.
To add to his ordeal, Mr Ang Jun Heng, now 22, was only found after nearly seven hours by a worker passing by.
His alleged attackers, Micheal Garing, 25, and Tony Imba, 34, who are from Sarawak in Malaysia, are on trial for the murder of another victim, Indian national Shanmuganathan Dillidurai.
They were allegedly part of a group of seven men behind the violent robberies in the Kallang and Sims Drive area in May 2010.
Taking the stand on Friday, Mr Ang said he could not recognise the men who attacked him. He said in his police statement that the attack happened quite quickly.
On May 29, 2010, he was walking back to his Sims Drive home from Kallang MRT station when he noticed some men walking on the makeshift path under the train tracks looking at him.
Hit He did not pay much attention to them as foreign workers were a regular sight in the area.