You have to feel for all of the parties involved here, other than the people watching on, who were treated to a once-in-a-lifetime sighting.
Usually, you have to head out for a game drive to spot one of the more elusive members of the Big Five. Not always, though.
Usually, your best chance of seeing the big cats being active is to wake up early and get out of the camp. Sometimes, though, the action comes to you.