This volume of Jackass is more of the same - stupid (albeit set up) pranks that are either funny, sickening, or seem to risk the lives and limbs of those who dare to undertake them. If you like the whole Jackass scene, you should also take a look at Dirty Sanchez - which is very similar to Jackass but is a bit more harsh - they seem to undertake the stunts the Jackass crew either can't or won't.
I don't recommend you buying the single dvds for a series because the single dvds cut out some of the clips. I learnt this the hard way. If you want all the clips you should probably just buy the boxset.