Camera

"You see. The prefix mega- means 'large.' And this camera I sold you has twelve LARGE pixels. I never lied to you!"

Shells

Shampoo

No, I didn't make it up.

"Try our horse shampoo for humans! It contains biotin that will make your hair grow stronger!"

"Actually, biotin is not absorbed through the skin. You'd have to ingest it for it to have any effect."

"Horse shampoo with biotin! If you drink it, your hair will grow strong and healthy!"

Primitive

"The lion is brave because of its big, strong heart. If I eat its heart, I will be brave too."

"Sharks don't get cancer because their skeleton is made of cartilage. If you take shark cartilage, you won't get cancer either!"

Clarke's Law

"Are you sure that omnidetector of yours is advanced technology? It doesn't look like it."

"Of course! Do you know Clarke's Third Law? "Any sufficiently advanced technology is indistinguishable from magic."

"Yes. So?"

"Well, magic doesn't work, and neither does my omnidetector! It's totally advanced!"

"Awesome! I'll take ten!"