As you leave the trail, you realize just how long a night it's been. The sun has already risen slightly above the horizon, and birds are singing a grand chorus to welcome the new day. Feeling rather exhausted, you decide to just walk back home and figure things out from there.
As you walk to your door, you see your neighbor getting an early start on some yardwork. She smiles politely until you get nearby, then directs a strange look to your waste.
"I see you're... ehm... 'excited' to see me, huh?"
Not understanding, you look down and see a huge bulge in your pants, stretching the material to its limits. You immediately turn a spectacular shade of red, blushing from your embarrassment while you cover your shame with your hands and rush to your door.
As soon as you're inside, you rush to your chair to inspect the damage. Pulling down your pants, you find absolutely nothing out of the ordinary. No boner (and certainly not the mammoth one you had just a moment ago), just your regular old penis flaccid as it'd be if you were coming out of a cold pool. That's when you remember the strange voice from before, its words echoing in your mind:
"...I'm going to savour your humiliation..."
Could this be the "humiliation" it mentioned? No, it had already turned a man into a rubber wolf and considered giving another a latex muzzle to barely be a start, so a single massive boner couldn't possibly be the full extent of what it planned to do. If anything, this was just practice for something much, much worse.