The Lonious Monk
Celestial Souljah
That size snake probably isn't trying to eat a human. It's likely just pissed of the person is near it. If the guy yells and swipes at it, it will likely retreat. The guy can then move over to the center. Lions can climb trees, so the guy could taunt the lion to get it to come after him. Once the lion tries the added weight will make the tree fall over. The guy should be ready to jump so that he can land on the ground while the lion falls into the water. The confrontation between the lion and croc with give the guy the chance to get away.