A passenger train is creeping along,
slowly. Finally it creaks to a
halt. A passenger sees a conductor
walking by outside.

“What’s going on?” she yells out the
window.

“Cow on the track!” replies the conductor.

Ten minutes
later, the train resumes its slow pace.

Within five minutes,
however, it stops again.

The woman sees the same conductor walk
again.

She leans out the window and yells, “What happened? Did we catch
up
with the cow again?”