Riddle

It can cause deflation of tires when dropped from the rear of spy cars.

Choose an answer

A.Nails
B.A grenade
C.Oil slick
D.Spikes
Hint: It's a word with 6 letters, starting with "S".

Answer

Spikes

Why this is the answer

Spy movies often show tire-deflating spike strips deployed from the back of a getaway car to stop pursuers.

This riddle is filed under Hard/Difficult Riddles and rated Medium.