Benefit of the doubt

[Mack10]

Is your spot where the runner went out of bounds with the ball, or is the spot where the ball went out of bounds by itself? a) The runner could have fumbled, with the ball going out bounds at the 1, and the runner continuing on (inbounds or out) to hit the pylon. b) The runner could have gone out of bounds at the 1 (e.g. stepped on the line) ... with the ball coming loose (no fumble since it's now dead) ... and the runner continuing on to hit the pylon.
c) as you indicate, somebody else could have hit the pylon.

In all cases, sounds like the wing made the right call. If I'm the wing, I'm going to tell you why I called what I called.