Five mechanisms have been described in the literature regarding lightning injury
mechanisms. A sixth mechanism is proposed in this article, namely, lightning
barotrauma. A simple laboratory experiment was conducted using ordnance gelatin
for ballistic studies. Lightning was simulated in a high-voltage laboratory using an
8/20-microsecond current impulse generator and discharged through ballistic gel.
Temporary and permanent cavity formations were confirmed. The cavities formed
were directly proportional to the currents used. Findings suggest that a sixth
mechanism of lightning injury, namely, barotrauma, should be considered.