ok so i have beaten the games twice, Once in regular difficulty and once inchallange mode, after i beat it in challange mode i selected start a new challange mode and keep all my weapons armour ect. so i started playin on the second challenge mode and then i got like 30 feet then teh game froze so i restarted and then i just went back to playing so im at the end of teh very first level as soon as u start or start challange mode again and the bridge breaks and i fall then u have to move the left joystick to move ratchet so he doesnt get hit by flying cars. i hit the bottem ( wich is teh end of the level i think) and teh screen goes black but i can still hear teh traffic of the cars and horns of them too. so i turned off and started playign about 5 times then. i restarted my ps3 and the Update thingy came up and i thoguht o maybe that was the problem so iupdated went to go play went to load and i lost all of my saved games. it just happend to me like 5 minuts ago iv tried restarting and everything but it seems that they are gone for ever all taht work for nothing

Errr, that isn't a glitch exactly, it's more like a system failure issue.

Sorry to hear you lost all your saved data.....Your game was probably screwing up either because your system is dying or something, or the disk is damaged.

System failure

Yup, sucks doesn't it.