For WHEN IT HITS YOU (YOU WILL HOLLER AMEN), if we do it in C, which is likely, here's a start on the refrain. I dunno if it's what THEY'RE doing but it's what WE can do:

REFRAIN:
When it (C)hits you (when it hits you), you will (F)holler (you will holler): A- (C)men (Amen), (F)A- (C)men (Amen)!
When it (F)hits you (when it hits you), you will (F7)holler (you will holler): A- (G)men (Amen), A- G7)men (Amen)!
Make you (C)jump (make you jump), make you (C7)shout (make you shout),
Until the (F)tears (the tears) come a-burstin' (D7!)out (burstin' out)!
When it (C)hits you, it (C7)hits you, (F)O-oh! you will shout!   (F7)"A - - - (C)men!!"

So the verse would be pretty similar, right?

~S~