Hercules couldn't kill the Nemean Lion with his bow, as the arrow bounced right off.
Hercules' arrows bounce off the lion because this was a special lion that could not be killed by conventional weapons.
Hercules was patient, as he waited for the lion to return before attacking.
Hercules used his club to stun the lion, and then strangled him. After, he took the lion's head as a trophy.
Hercules was proud of himself for killing the Nemean Lion.
Hercules WENT to the Nemean Valley. The lion WAS out hunting. The lion RETURNED. Hercules SHOT him with his arrow, but it bounced off. The lion WAS special, and couldn't be killed by conventional weapons.