I'm a little on the big side and when I'm barreling down the trails at the local park on my Fat Bike I often see the look of bewilderment on the faces of people coming towards me on the trail - be they walkers or bikers.
Often the bewilderment turns quickly to fear and I can see their eyes glancing sideways as they wonder which side of the trail to swerve into....sometimes they freeze up with the classic 'deer in the headlights' gaze so I just ride over the top of them. Bloody tourists mostly, FIBs as they're fondly referred to in these parts