It is uncertain whether the cyclist sustained any injuries.
Police officers identified and arrested the teenagers within three hours.
A passing commercial ship had responded to the vessel's distress call.
Neighbours describe him as reclusive and introverted.
His last known whereabouts were in the vicinity of Block 146 Serangoon North Avenue 1.
The court did not deem a prison sentence appropriate.
A driver had to be extricated using hydraulic rescue equipment.
The building is set to be complete by end-2026.
Tan Chuan-Jin also reiterated the need for civilised debate.
He will appear in court again on 26 May for his pre-trial conference.