Briefly explained

Perhaps it was also the arrogance of a sports car driver that made him park the DeLorean in a parking lot that was clearly not intended for it

And occasionally supernatural influences

The planetary model requires a 9V battery

Not Crazy Color:Blue Briefly explained[Howard: "Sheldon, you're wrong! Wolverine was not born with bone claws!" Sheldon: "Howard, you know me to be a very smart man. Don't you think if I were wrong, I'd know it?" Raj: "Leave it up, dude, you're arguing with a crazy person." Sheldon:"I'm not crazy! My mother had me tested!"[ i] Wolverine actually had these extremely useful, razor sharp claws between his fingers from birth so much for that ;) We suspect that you're like Sheldon just because