if you sense intense heat and a bright flash with no noise,
DO NOT TURN TO LOOK at the FLASH,
You can burn your retinas and become BLIND. (Bummer)
DUCK BEHIND OR GET UNDER COVER IMMEDIATELY .
Use anything or anywhere that will shield you from the intense thermal radiation (Brighter than a 1000 suns) and blast.
The faster you get under cover, the less burn you will receive.
Survival Step 1: The first few seconds. DO NOT LOOK, DUCK for cover IMMEDIATELY.