Due to us living within the close vicinity of the original bat-shit-crazy cat woman we get rats straying into our garden, I've rat proofed the shed but we've a small out building that needs some serious work to the concrete step to enable the bottom of the door to seal properly hence the evidence of the little bastards inside.
So mean time I'm thinking of DIY'ing a trap, I have plenty of tools, a fair bit of wood and an endless supply of nails, screws and nuts 'n bolts. So fire in some ideas, obviously the more comical the better, although whilst tiny chunks of C4 covered in peanut butter rigged to a tiny trip wire may be the most fun, it is inconvenient, painting C4 with peanut butter is a ball-ache.
I was thinking something weight based, maybe a tall container with a heavy, spiked ceiling that slides up and down inside and triggered somehow.
Give it your best shot