definitely - DS had Dd on the back of the bike when she was about 2 1/2, and some guy in an SUV pulled too far into the intersection at a red light, so he threw it in reverse and stomped on the gas. He slammed right into them and totally wrote off DH's bike. The guy didn't even wait to check if anyone was hurt - just yelled sorry out his window and drove off. DD's helmet was badly cracked and I think she had a headache as well, but the hospital just said to watch her for signs of concussion, but she was okay, thank goodness.