Listen to the song for the rhythm. It's from the Jackass 2 soundtrack listen for it at 
end of the film when the credits are rolling.
Not a difficult one to do or to figure out. I personally find it fun to just play around 
this song and add in your own little bits.
And it's a great little doozy for when you are first learning guitar.

Intro: G

G
Sometimes I don't know if I'll make it
                                   C
Sometimes I wished I could walk away
D
Sometimes I don't know if I'll make it through
                                  G
But you know I'm gonna do it anyway

G
Got a guitar and a heart that's been broken
                                  C
A sorry gig and borrowed cigarettes
D
A song I wrote for them jokers out there tokin'
                                                           G
And a cherry master chokin' mean old Knoxville half to death

Oh, sometimes I don't know if I'll make it
Sometimes I wished I could walk away
Sometimes I don't know if I'll make it through
Hell, you know I'm gonna do it anyway

Got a Jezebel and a hotel for shelter
A Jag I've been draggin' 'round for days
And a big mouth that had to go and tell her
What her big mouth momma told her anyway

Yeah, sometimes I don't know if I'll make it
Sometimes I wished I could walk away
Sometimes I don't know if I'll make it through
Well, you know we're gonna do it anyway

Yeah, sometimes I don't know if I'll make it
Sometimes I wished I could walk away
Sometimes I don't know if I'll make it through
But, you know I'm gonna do it anyway