A/N: This is a tag to Hell House. This is what I think may have happened when Dean put nair in Sam's shampoo bottle.
Dean sat at the small kitchen table, his feet propped up on another chair. He sipped coffee out of a chipped blue mug and simply seemed to be enjoying the early morning. His shoulders tensed in anticipation when he heard the shower upstairs shut off. He put on a blank expression and tried not to look interested.
However, the middle Winchester couldn't help but choke on his coffee when he heard a scream from the floor above.
A few minutes later Sam rushed down the stairs and into the kitchen. There was a towel wrapped around his waist and his hair and body were still wet. Strands of brown hair were tangled in his fingers. The younger boy was fuming.
Dean tried, but failed to keep the amusement out of his voice, "Goodmornin' Sam."
"What. Did. You. Do?"
"Whatever do you mean, little brother?"
"I mean this!" Sam exclaimed, holding the hair out to Dean, "What is this?"
"That looks like hair, Sam." Dean answered, very close to the brink of laughter.
"I know it's hair, Dean! It's my hair! Now why is it coming out?"
"What did you expect would happen when you washed your hair with nair." By now he was unable to contain it, he threw his head back and laughed deeply.
"I did." Dean said, still snickering.
"What is wrong with you! Why would you do that?" Sam demanded, trying not to think of the silky locks now decorating his clenched fists. He had been lucky to realized the tingling sensation was not shampoo and had quickly washed it out. He was now left with considerably thinner hair, but still had most of it. That small favor had not dampened his anger, "Dude, this is so not cool!"
"Bitch, you brought it on yourself." Dean's expression turned serious, "The moment you touched the impala this became war! Do you know how long it took me to get that freakin smell out of my baby?"
"You are so childish." Sam said in a huff. He shook his head and turned to leave. Shouting from upstairs stopped him in his tracks. Both boys had ignored the sound of the shower turning on not too long after Sam left it.
"Dean and Samuel Winchester, get your asses up here!" Their father's angry voice could be heard.
Dean turned to his brother, "Did you leave the bottle in there?"