Hey Bro!
There's no such thing as taking Spinal Tap too far! I have the honor of being able to say I saw them perform live and it was hilarious. I'll never forget the encore which was Big Bottom. Les Claypool and Larry LaLonde from Primus came out and both played bass while strippers from the strip club next door came in and made out and played with each other and the band. Classic stuff, Bro!
Just make sure the next time you're showing someone your guitar, tell them "this one sustains so long that you can play a note, go get a sandwich, come back, and it'll still be playing."
Cheers Bro!