This is wired
 

This is wired when i was at a light the other night out of no where my rpm just collapesed lower than 500 then came back to normal??? I didnt think much of it when when i was racing a buddy of mine i was in 3rd gear pedal to the metal doing 80+, and all of a sudden before it shifts to 4th the rpm dies comesback in like half a second then shifts to 4th and didnt have a problem after that. I maxed out at 130 and nothing after that. Yea i know i was stupid for doing that but my main question is what would cause that to all of a sudden happen.