@The_original_goku10000: I really don't think Raditz was faster than light, at least not without straining himself and even then he could only do it to dodge one attack. Personally though I think that whole scene was a load of BS.
However I've been reading threads like this. http://www.animevice.com/dragon-ball/10-1/how-fast-are-dbz-characters/97-314493/ and I'm starting to believe DBZ characters could indeed move faster than light towards the end of DBZ.
It's clear there that Frieza's attack was moving at near enough lightspeed, if not lightspeed itself .The others saw nothing but Vegeta was at a high enough power level to not only see it but dodge it and kick Gohan out of the way as well. There's definitely a correlation between speed and power and I've seen in another forum a scan of Vegeta stating Speed=Power.
Having said that Piccolo, Gohan and Krillen are all pretty powerful and even they only saw a flash. This does make me think that Frieza's attack was indeed faster than light. It also indicates that Vegeta can at least react to lightspeed attacks and save not only himself but another too.
There's also calculations in the thread which show that if power = speed than Goku was probably lightspeed somewhere into the Cell saga.
I don't know what to believe in anymore. Sometimes I think DBZ characters are hypersonic and at other times they seem to be FTL. Damn you Toriyama!!! Why couldn't you just tell us their speed!?!