3.
This pun from a galaxy far, far away (or jar, jar away):
5.
This pun that requires a bit of projection:
7.
This pun that can only be read:
10.
This very literal pun:
11.
This slightly hazardous pun:
13.
This extremely British pun:
14.
This one-two pun(ch):
15.
This pun you could make a whole sandwich out of:
17.
And finally, this absolute masterpiece of a pun from Colin Mochrie: