Time Traveller

Throwing yourself unceremoniously onto your own horse as guests and staff of the hotel charge out after you, some desperate yells and your heels into the animal's flanks get it moving. And not before time; behind you, the sheriff and men you don't recognise are hurtling up the street on their own horses, unlimbering pistols. Sharp cracks that rend the air begin sounding behind you, amid the angry shouts, and dust is being kicked up all around you from the bullets.
"Hurry it up, man!" Joe shouts from some way ahead. You're wondering if it's such a good idea to follow this man back to the hideout; the Sheriff certainly isn't just going to give up. Maybe it would be better to get back to the time machine and get out of here? The Sheriff's men are gaining, and the bullets are getting more accurate. You'd better make your choice!