You see a knob on the watch, which is placed further away from the rest. Curious, you place your hand on it and brace yourself for whatever change it brings.
*knock* *knock* *knock*
The knocking on the door nearly gives you a heart attack! you spin around as your brother Shaun walks in.
"Hey bro. I was wandering if you wanted to talk. I know you and gramps were close, so if you-"
He stopped talking as his body twitched and fidgeted. He shivers as he looked at you perplexed. Confused yourself, you look at the watch. You see a small arrow engraved at the top. It's pointing right at him! You also notice that the watch has a date at the bottom. Unlike other watches however, you see a year indicator. When you had jumped, the knob had been turn! The year now read 20,000 B.C! excited, you look back at your brother to see what will happen.
As you look at him, you see that his arms have lengthened, making his sleeves look short. His shirt seemed like it had gotten a little baggy too. Hair poked out from the top of his collar, as his skin and hair began to darken. Shaun winced as his feet stretched wider. Convulsing, He looks at you pleadingly.
"Help me..."
You stay where you are.
He still seems annoyed as he grabs his pants and underwear, and rips the offending cloth away. Satisfied, he itches his head and his crotch, before he searches the room. picking up items that catch his eye. He grunts and lets out a few ape like 'ooks' as he explores.
Shaun goes around the whole room before coming back to you. He looks at you and sniffs. Grunting, He leaves you alone and continues his search. He recognized you as friendly, but didn't know you. His mind lacked the knowledge and ability to even remember he was once human.
At that moment, your brother's forehead juts out slightly, and Shaun grimaces. his jaw becomes more rigid, be. His nose becomes bigger and flatter too.
Looking down at the watch, you realize that that knob controlled the evolutionary timeline of the target. You had turned you brother into a caveman!