Any man cave worth it's salt should have a Wall of Shame! Collect parts that you're really well and truly killed...pistons with valves embedded in them, interestingly "S" shaped rods, catastrophic Kool-Aide moment blocks, crank "kits", tire-walled fenders, anything hideously mangled, and mount 'em like a proper taxidermist. For a real touch of class, you could add some nice plaques describing the kills and pictures of the debris field.
If you have a completely scattered motor, make an end table diorama out of it with the parts you could sweep up in nice action poses, natural history museum-style.
Anyone with enough $$ can buy a coffee table made from a replica of some gorgeous Italian V-12, but how many guys have a coffee table made from an "insert make and model of motor you've grenaded here" which you killed by "insert hideous motor-killing abuse here" on XX/XX/XXXX?