The woman got back on the bus, hit the driver again and got back off.
The driver started to drive again but another passenger, who called the police, told him to pull over.
"I think the bus driver was really rattled," Didozich said.
Afterwards Didozich talked to the bus driver who said the woman had a problem with the $20 note she gave him.
"She started demanding her money back and he was giving it to her when she just freaked out and started hitting him.
"It just made me wonder what's going on with her that made her start lashing out at everyone."
Didozich said she only jumped on the bus today because her car was getting repaired. "If there's one thing I've learned it's that if people hurt others it's because they're hurting inside."
A police spokeswoman said officers were looking for the alleged offender.