Sophocles, Trachinae 1097 (Greek tragedy C5th B.C.):
"You [Herakles] tamed the beast in Erymanthia."
The capture of the Erymanthian Boar was Herakles' fourth Labor. This boar wasn't Babe. It was giant, quick and deadly. Not only did it have dangerous tusks (the death of Adonis shows how deadly these can be), but it was prone to rages. It had been raging and destroying the fields of Psophis in western Arcadia. This region was a favorite haunt of Artemis and tended to be more remote and wild. People were afraid of the boar and wanted it gone. Herkales set out to capture it. And capture, not kill, because Eurystheus wanted to make the task all the more difficult.
Herkales made his way to Mount Erymanthus in Arcadia, where the boar was known to roam. On the way he decided to visit Pholus. Pholus was a centaur, son of Ixion, and friend of Herakales. He gave shelter, food and company to Herkales. They shared a meal and Herakles noticed some wine and asked Pholus for a drink. Pholus told him he old had one jar and it was a gift from Dionysos to the centaurs of Mt. Erymanthos. Herakles convinced Pholus to open it and the smell of wine drew the centaurs to the area. Some retellings say that the centaurs got drunk off the wine first and others say that were merely angry at the perceived violation of their gift from Dionysos. Either way, the other centaurs attacked Herakles. He launched poisoned arrows at them, but they retreated within Chiron's (his old mentor) cave.
Pholus was curious about the arrows and picked one up, inadvertently poisoning himself when he dropped it and it stabbed him in the hoof. Chiron was also hit, most accounts say by a stray arrow, and was poisoned. Since Chiron was immortal he didn't die, but lived with terrible pain and agony. Later, he'd give up his immortality and became a constellation in the sky.
Though most tellings don't delve into Herakles' thoughts and feelings, one can only imagine how bad he felt. Two friends, kind centaurs were killed due to his foolish and unthinking actions. I can imagine him thinking, if only I didn't open the wine! After this incident he decided to continue on with his task of capturing the boar.
Using the advice Chiron gave him, Herkales chased the boar into the mountain snow to weaken and tire it. Eventually he was able to get an upper-hand on the beast and trapped it with ropes or a net. He then bound the animal and started his journey back to Mycenae.
This Labor, out of the ones I've covered so far seems different. Perhaps it's the diversion with the centaurs? Herakles decided to take a breather for a bit, but it failed miserably. He pissed off the centaurs, which lead to the deaths of his two friends. Seems like Herakles can't catch a break. After this, he's wading in shit (literally) in the Augean Stables, but more on that soon!
The Erymanthean Boar