This song can be quite confusing. I hope this will help you out. 

C/g means: C-chord with a G in the bass, listen to this song for the strumming and 
you will understand.

intro

C/G C/G F/F C/E | C/E C/G C/G C/E 
C/E Am/A F/F C/C | C/G C/E C/E Am/A 

In the verses the second C/g chord switches to a C/c chord:

C/G C/C F/F C/E | C/E C/G C/G C/E 
C/E Am/A F/F C/C | C/G C/E C/E Am/A 

When 'and you clutched, kicking heels' starts it goes slightly different: 

C/G F/F F/F Am/A | C/G D/F# F/F F/F 
C/E C/E C/E C/E  | Repeat intro


A tip: play the intro over and over again so the "infinite strumming" thing gets in your system.