For example:

It was a simple BLS call for a slip and fall with possible head injury. Myself (EMT-B), the crew chief (EMT-I) arrived on scene in the ambulance, Extra un called EMT-P arrived in personal vehicle and Duty EMT-P arrived by personal vehicle. Pt was sitting and alert with visible brusing to forhead and thigh. Stated he had fallen when the top of a stair he was installing gave-way beneath him dropping him on a pile of lumber on concrete slab. Bystanders report brief moments of Loss of Consciousness. Pt wants to refuse service and starts walking around to "shake it off". With strong persuasion from Extra paramedic(pt's friend) Pt accepts transport. PROBLEM STARTS HERE. Extra paramedic starts to take control of scene and orders standing long board application. Pt is 6'11" tall. Duty chief is only EMT-I and Duty Paramedic has already triaged down. Luckily our duty chief is a strong personality and simply ignores the Extra and we get out the stretcher and have the Pt lie down on the long board. In this case the protocols state to avoid bending the spine if there is any chance of compromise so - standing long board application. Problem is that that works fine with a patient that is approximately the size of the long-board and not at all with a patient who is a full foot taller than the board. The chief didn't have the learn'in of the paramedic and hadn't been to school as recently but he knew what would be possible.