On the first hoverbike race planet (can't think of it's name) you go to the swing shot area when you have swum through the first water area you come out and walk to the left turn around and look at wall there is a very tiny ledge jump up and grab on traverse all the way around till you come to a platform jump down and swing shot across the 2 swing shots onto the turn thing ride it around and you will see a cave opening you ahve those dog things to fight and in there bingo a platnium bolt. To get back just do the course in reverse or just die. Hope this helps.
PS if you look on your map you will see the turny thing that you have to get too.
Added by: nictricky Jul 12th 2005, ID#16037