1. Invite Fnaar round
2. Ask him to build a compost heap in your back garden
3. While the compost composts, make a brew and cue up RATM's Bombtrack, but don't put on yet.
4. If he hasn't brought his "kit" with him, go and get an aerosol deodorant from the bedroom, preferably Mandate, and a lighter.
5. After 3 hours, the heap should be rat city. Fnaar will be getting more and more agitated and excited. Walk over to the stereo and start Bombtrack.
6. Follow Fnaar out to the heap, and just as the immortal words "Burn BURN yes you're gonna BURN" come blasting through, ignite flamethrower and watch those F**k*rs burn.
7. Once all vermin has been torched, hi-5 Fnaar, tell him to GET OUT, and go and put your feet up with a nice cup of tea and a slice of Genoa Cake.