One of the most terrifying endeavors you can undertake is clearing a building when you know or strongly suspect there might be an intruder lurking inside.
If you are already in the house, the terror quotient is upped exponentially, especially if you suspect that the intruder intends to do you or your family harm.
In and of itself, this qualifies as a survival crisis, but in an actual survival situation, where desperate people behave desperately, it can be an ongoing threat.
That will stress you out, jangle your nerves and weary you.
Weary people make mistakes, which is why you have to have the methodology of clearing a building down to a process down pat.
To see how and get some advice on how to clear specific areas of a building (like doors), check out the next page.