Thanks for the replies, I'm starting to think it maybe a computer malfunction?

My SRS light would randomly come on and then turn off but I didn't think anything of it, well it's been popping on a lot and when it comes on it makes my ABS light flash for a split second, then when the light decides to go out I get (as mentioned before) a small sudden jump in RPM's :/

Now I've i've been driving it to work and back and all around and it hasn't done it again but every time I get to a red light, I'm kinda just waiting for it to happen again, cause it was just so random the first time!

There could be so many things wrong.... I was really looking at the engine bay today and after a year of having this car with the excellent service it's provided I'm seeing decayed wires, vacuum lines that are just left hanging with no sight of where they go, weather'd components and I looked at my MAS computer which looks like it's been messed with before by the previous owner with some type of adhesive holding the casing to the actual computer.

It's pretty much like "where do I start?"

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76 MG Midget
78 Datsun 280Z
86 Peugeot 505
01 Subaru Outback

“Owning a car is like owning a dog. Every now and then, it craps on the carpet — but it’s still your dog.” - Jeremy Clarkson