Spiky Fruit

I think rambutan look unappetizing for a few reasons. First of all, they're covered in spiky hairs that look like they might be sharp (they're not). Like this:

Image from http://www.djunadesign.com/dreamweaver_b/week4/hw4.html

And second of all, they're attached to pretty regular old tree branches. Like this:

 Third, once you get them open, they have a texture not unlike that of an eyeball. In fact, they kind of look like eyeballs. Like this:

But if you can get past the spiky eyeball appearance, they're actually quite tasty!