The 20-year-old was reportedly riding a BMX-style electric bike when the accident occurred.
According to TMZ, the first to report the news, Pax was traveling along Los Feliz Blvd in Los Angeles around 5 p.m. when he crashed into the back of a vehicle stopped at a red light.
The driver of the vehicle allegedly got out to check on Pax, and once emergency personnel arrived on the scene they determined the 20-year-old needed to be transported to a nearby hospital.
Pax complained of hip pain and paramedics feared he suffered a minor brain bleed. He was not wearing a helmet at the time of the accident.
The 20-year-old is said to be in stable condition and is expected to be released from the hospital on Tuesday.
This should serve as a public service announcement about the importance of wearing a helmet while riding an electric bike.