When is the last time you saw a hitchhiker

[Canuck]

A man was hitchhiking and had been passed by many vehicles.
One finally stopped with a male driver.
After a few minutes the hitchhiker spoke and and expressed his thanks saying;
“ that was good of you and very trusting to pick me up, for all you know I could be a serial killer”
The driver scoffed at the suggestion saying
“ what are the chances of two serial killers being in the same car”.