Spinal Tap: Funniest "Fake" Movie Ever?

Alright action junkies, I know, I know, This Is Spinal Tap ain't got explosions and dudes getting thrown through windows. But hear me out! As a fan of practical effects and REAL stunts, I gotta appreciate the dedication to nailing the look of something, even if it's a joke. This movie is so damn convincing as a real doc about a struggling band, it's almost scary. Like, the costumes alone? Nigel's guitar collection? The Stonehenge prop SNAFU? Comedy gold, people, comedy gold. Seriously though, I've watched behind-the-scenes stuff on real rock band documentaries and, I swear, Spinal Tap exaggerates, but it doesn't invent anything. It feels like they just took the most ridiculous parts of rock star egos and amplified them to eleven (pun intended!). The band's infighting, the clueless manager, the disastrous gigs...it's all painfully believable. Does anyone else get that feeling? What's your fav cringe-worthy moment? Mine's gotta be when their new album is just sitting on the shelves, untouched. Ouch. And okay, maybe it's not a stunt movie IN the movie, but I'd argue that making a mockumentary this good IS a stunt. The actors completely commit, playing these characters straight even when the situation is utterly absurd. The subtle improvisations, the way they react to Rob Reiner's questions, it all adds up to something truly special. Is it just me, or is 'Stonehenge' one of the greatest scenes ever commited to film? Let me know your thoughts! So, action fans, do you ever stray outside the realm of explosions and car chases for a little comedic genius? And if so, does Spinal Tap hold up for you, or am I just blinded by the awesomeness of Nigel Tufnel's guitar solo on a violin?