<human>: I spent the summer after college in Ocean Beach, San Diego. Total hippie town (parts of Almost Famous filmed there). Everyone is super friendly.

Anyway, I slept on the couch next to my buddy's black lab, Lou. Friendliest, most adorable dog you've ever met. One day while my friend was at work, I accidentally left the back door open on my way to the beach. It took me about 2 minutes before that sinking feeling kicked in: *oh shit.*

Went back to the house, dog was gone. Called my friend: "...dude...I'm sorry beyond words, but I left the door open and your dog is gone". He was crushed. No worries, I thought, surely someone will find Lou, realize he's lost, and call the number listed on the dog tag.

My friend: "HeyHay...dude...I washed him yesterday. I didn't put his collar or tags back on". I've never felt so bad in my entire life. I felt like the biggest douche.

We spent the next 48 hours combing every last inch of OB, printing out flyers, speaking with local animal shelters. Nothing. About a week later, still incredibly bummed, we found ourselves drinking heavily on the front lawn. Out of nowhere, we heard a loud voice: "DID ANYONE LOSE A BLACK DOG"? Next, we see a shirtless old man driving an ancient pickup truck, smoking a joint, and talking through a megaphone as he slowly drove down the street. Lou was in the bed of the truck looking like he just rummaged through the trash.

Can you provide a brief overview of the text?
<bot>: Lost my friend's dog without his collar / tags. Random stranger found him, threw threw him in the bed of his truck, and drove around town for hours yelling "did anyone lose a dog" through a megaphone.