[Well that's not too far from the truth. Hiro always rises to challenges and pummels them to the ground, but this is now a matter of not only a mounting frustration but also just flat-out irritation. He flings his hands forward, waving them a bit as he finally just...sort of explodes.]

Dude I don't know how to tell you a convincing lie because you're the god of lies! Even lies have to be based on some facts otherwise the whole thing's going to fall apart anyway! It's not like I can just say that it's going to start snowing in my room again and it magically happens because it doesn't work like that!

[...nope. Still stuck on logic. Sorry Loki. He just buries his head in his hands again.]

I hate you. [Even that's not convincing.] This entire room's a giant lie. This spire's gonna collapse really soon because it's not even real.