If the plane s/he saw only clipped the corner of the south tower then s/he must also be claiming that there was a third plane. The north tower was attacked first, the south tower second - or is s/he claiming the 767 looped around and went for a direct hit after s/he saw it fly overhead and clip the corner of the south tower?

If the plane he/she saw only clipped the corner of the south tower then he must also be claiming that there was a third plane. The north tower was attacked first, the south tower second - or is he/she claiming the 767 looped around and went for a direct hit after he/she saw it fly overhead and clip the corner of the south tower?