A/N: Here's the next one. I'm thinking of wrapping it up soon, but there is a sequel/epilogue for this story! Enjoy! :D
"Hang on," Sherlock said in monotone, handing the doctor a flask of bright green chemical and opening the freezer. He then placed an armful of jars onto the table, each containing a frozen eyeball. The Doctor recoiled slightly.
"Eyes…?" the Doctor said uncertainly.
"I've been wanting to try this for a while." Sherlock said, taking the flask from the Doctor and pouring it into a beaker with blue chemical. There was a small, fizzing, chemical reaction before it settled. The Doctor caught sight of a beaker with a clear liquid and immediately picked it up.
"Don't!" Sherlock said, frustrated, but the Doctor sniffed it.
"Hydrogen peroxide," he announced, "Thought it was water for a moment, but this is a bit better." He continued to sniff each of the remaining beakers and flasks, identifying each one. "Iodine… kerosene… I do love chemistry."
Sherlock gave the Doctor a pointed look, and the Doctor realised what Sherlock wanted to do. The Doctor was handed a jar containing a frozen eyeball, and he proceeded to dump it into the beaker of hydrogen peroxide.
"Let's see what happens, then." Sherlock said, taking a small black notebook from an inside pocket and flipping to a blank page.
"Alright. Hey, buddy?" the Doctor was talking to the rather subdued-looking eyeball, which had sunk to the bottom of the beaker. "Let's just put you on here, and see what happens." He put the beaker on the stand above the Bunsen burner and flipped it on. It took a few minutes, but the hydrogen peroxide eventually just became water. However, the eyeball thawed quickly and burst soon after, due to the change of temperature at such a rapid pace.
John had watched this entire exchange from the door into the kitchen on the landing, smirking a bit. He went back into the living room, picked up a book, sat down in his armchair, and started reading.
There was a small pop and noises of surprise from the two geniuses in the kitchen, then small bouts of laughter.
"I was not expecting that!" the Doctor's voice said.
"No, not all!" the deep baritone said, "Better clean that up, or Mrs. Hudson will have all of our heads!"
