Fire
Sizzling and hot
A burning sensation to the skin
Leaving ashen faces and scarred bodies

First, it starts off as nothing more than a spark
Then, as it grows larger, fire will catch, and this is when the real fun will begin
Later, as if being an inferno is not enough, something will add fuel to the fire, causing it to be uncontrollable
A blazing flame will arise, making everything around it to go into peril

The fire will destroy everything that comes in its way, having no mercy
Once all the burning has done, the few remaining survivors will crawl out cautiously, as if they are ready to bolt at any second
Struck faces and burned bodies will be forced to get right in and work right away
Yes, fire is an unforgiving thing.