Answer:
It can cause deflation of tires when dropped from the rear of spy cars.
This is rectangular, hollow and has a lid, and where you’ll find it you might wonder, it is just six feet under. What is it?
I know a word of letters three. Add two, and fewer there will be!
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
You use a knife to slice my head. And weep beside me when I am dead.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?