Set the brake on your baby carriage, wheelchair, or wheeled luggage if you plan to take your hands off it. Don't want this to happen. Luckily, this one was empty.
It's also important to be mindful of prams during shootouts on stairs.
People have been warned about this for about a century, but it still happens.
• CCTV: Pram sucked into freight train slipstream (YouTube / ODN)