What’s wrong with that example?

LO1 Suppose Rudolph, pulls the chain, which immediately turns on a light; then he immediately goes to the lever, immediately presses the lever, immediately hears the dipper click, immediately bends down, immediately licks the dipper, and immediately gets a drop of water.
That’s a behavioral chain. And the drop of water either directly or indirectly reinforces that entire sequence of responses. Because there is no pause greater than 60 seconds between any link in the chain, the drop of water reinforces the entire behavioral chain and not just the terminal link, the lick of the dipper; all the links in the chain will occur more frequently and in the right sequence as a result of that reinforcement. In other words, that entire behavioral chain acts like a single response, a single, reinforceable response unit.