Did I scare you? Have you seen this fruit before? It's called pulasan (scientific name: Nephelium mutabile). It's a Malaysian fruit, which can be considered as the cousin of the Thai rambutan, only larger. I think in Thailand the pulasan is known as "ngoh-khon san"... have you heard about it?
It's my first time trying the pulasan! It looks like a mix of rambutan and lychee. The inside is fleshy, juicy and very sweet!
It's a good try, but still prefer the Thai rambutan, because of the flesh consistency ^_^