Its not easy being a spike-trap.
By design, players are supposed to get by you without TOO much trouble.
But you just cant do that.
After years of seeing the same guy running by, over and over, day after day -- you realize you are in love.
Unfortunately, the only means by which you can express this love is by showing him how good you are at crushing him into a tasty broth.
Someday, you are sure, he will get the hint.
PROTIPS: Be patient.
Wait for the right moment to strike! It takes a second or two to reset yourself, and in that time he can escape!
Unless there is a powerup he will never just run straight through.