Well, heck, the one I mentioned was in 79 on a long strange trip (from Albany NY to Daytona FL, and back) so I don't remember exactly but as I recall my buddy (900 Z1) and I (GS750) looked at each other and laughed. Not so much shock and awe as "aw shucks, WTF?" As for stopping him, we had no such desire but the diameter of the parking lot accomplished that anyway (while we turned around sharply and peeled out, leaving him backing and filling).
SOME choppers can be intriguing, if ridden to Mardi Gras with interesting gas tank contents and Jack Nicholson on the back, but.....