[quote=@Silver Fox]
<Snipped quote by Demon Shinobi>

Guess that means he considers Karn and Mithera not modes of transportation like Happy is to Natsu.

Also, he didn't seem to care about which. Does that mean he's unaware of his own weakness because he may have never actually experienced riding in a carriage or other means of transportation?
[/quote]

I'm pretty sure I literally wrote a sentence stating that he doesn't know of it. XD

Also... Of course they aren't transportation. Karn and Mithera are Karn and Mithera. 

[quote=@Zarkun]
Let's remember that Fairy Tail had a man who can turn his limbs into metal at will survive at least ten million watts of electricity that would have killed Natsu.

EDIT: Oh, he also has numerous metal piercings.
[/quote]

True but it's possible he could have grounded it with his metal dragon properties rather than allowing it to actually effect tissue organs and the like.