When Billy runs into the office proclaiming everyones jumping off the old cliff are you straight out of your chair, bag in hand, running for the queue? Before he's even had the chance to finish his sentence?
Or are you a complete lone-ranger. Uninfluenced, unmoved, by those around you.
When the fat women at the back of the office screams 'fire' and everyone else is leaping out the windows and clammering to the door, are you sat, just coolly tapping away at you're computer, nonchalantly waiting for the official fire alarm to be activated? A truly independent creature in times of mass-consumerism and 'fads'?
Side note: Is the singular 'a sheep'? It doesn't really sound right.