Like Polonius, Like Laertes

Act I, Scene 3 

OPHELIA

And hath given countenance to his speech, my lord,
With almost all the holy vows of heaven.

LORD POLONIUS

Ay, springes to catch woodcocks.

...

Act V, Scene 2 

OSRIC

How is't, Laertes? 

LAERTES

Why, as a woodcock to mine own springe, Osric;
I am justly kill'd with mine own treachery.

Never noticed that before.