You found yourself back in time in the late 1990s looking for Sam

Hold on I'm getting ahead of myself. Let's cut back to 5 minutes ago. You and your best friend Sam were at a science lab, when the science guy (let's call him Bill) wasn't looking, you and Sam jumped into his time machine and went back in time to the late 1990s. You could've sworn you went with Sam, but now he was gone