The accident occurred at a home on Green Hills Drive in Raritan around 4:30 p.m., Raritan Police Lt. Scott Nelson told DailyVoice.com.
The man had suffered a head injury and went unconscious, though he had regained consciousness by the time officers responded, Nelson said.
The man was then taken by ambulance to Hunterdon Medical Center before being flown via MedEvac to Morristown Hospital.
Click here to follow Daily Voice Northern Valley and receive free news updates.