The missing bike...

A man loses his bike outside the synagogue and goes to his rabbi for
advice. "Next week, come and sit in the front row. And when we
recite the Ten Commandments, turn around and look at the people behind
you. When we get to "Thou shalt not steal", see who can't look you in
the eye. That's your guy." The following week, the rabbi is curious
to learn whether his advice panned out. "Like a charm" the man
answered, "the moment that we got to "Thou shalt not commit adultery"
I remembered where I left my bike."