A bus that took a corner too fast hurled a young baby from his pram, his parents said.
Six week old Isaac was sent flying onto the floor when the bus swerved so hard it also knocked his dad Josh Fowler off his feet and flying into the back doors of the bus..
Courtney Carnell, 20 and Josh, 19, were on a day out with Isaac when the alleged incident happened.
Courtney said: “What was supposed to be a nice family day turned out to be a day from hell.”
Josh, who suffers with back pain after a car accident last year, says the incident has caused him even more discomfort.
Luckily, young Isaac fell onto his baby-changing bag which cushioned his landing and prevented any dangerous injuries.
A spokesperson for Transport for London said all nine bus drivers on the 428 route had been interviewed and investigations were ongoing.