Winds provide the energy to set the 1940 Tacoma Narrows Bridge motion. Oscillations travel to the central span and reflected from support towers. By the principle of superposition the primary and reflected waves turn into a standing torsional wave. A node provides the safest path for one man escaped from the bridge. Vortices of air turbulence moderated by the investigators broke way from bridge of frequency that closely match the natural frequency of secondary harmonics of central span. Every time vortex lid away the bridge bows slightly. Resonance developed and amplitude of standing waves grow and grow until waves rip the bridge apart.