There are many ways to reset a crashed iPod.
Hold pause down until it turns off. (This is just the normal turn off procedure)
Hold center button down and menu until you get apple logo. (This worked for my 5th gen ipod)
If that doesn’t work:
Hold pause and menu until you get the apple logo.
If you need to do a hard reset, also hit the right or left key. (not sure which)
If that doesn’t work you might need to restore from disk.
If that doesn’t work ….well… I don’t know.