Not mine. I was surprised that this site didn't have it.
Taken from: http://www.1stchords.com/cave-in-chords-owl-city/
Capo 1st

Intro: F C G ( 2X )

FPlease (133211@1)take a long hard look
                      CThrough (x32010@1)your text book cause I'm history
FWhen (133211@1)I strap my helmet on I'll be long gone
C (x32010@1)                       GCause (320003@1)I've been dying to leave
     FYeah, (133211@1)I'll ride the range
                              CAnd (x32010@1)hide all my loose change in my bedroom
FCause (133211@1)riding a dirt bike down a turn pike
C (x32010@1)              G (320003@1)   FAlways (133211@1)takes its toll on me

F Am G Dm

FI've (133211@1)had just about enough
                          A#Of (x1333x@1)cloaked diamonds in the rough
                               GBecause (320003@1)my back-bone is paper thin
                                    D#Get (x43121@3)me out of this cavern or I'll cave in

(I'll cave in, I'll cave in...)
Am (x02210@1)            G (320003@1)                     DmIf (xx0231@1)the bombs go off the sun will still be shining

(The sun will still be shining)
F (133211@1)                    AmBecause (x02210@1)I've heard it said that
                 G (320003@1)                FEvery (133211@1)mushroom cloud has a silver lining
                            G(Though (320003@1)I'm always under mining to deep to know)
FSwallow (133211@1)a drop of gravel and blacktop
CCause (x32010@1)the road tastes like Wintergreen
FThe (133211@1)wind and rain smell of oil and octane
C (x32010@1)                GMixed (320003@1)with stale gasoline
    FI'll (133211@1)soak up the sound

Try to sleep on the wet ground
C (x32010@1)                  GI'll (320003@1)get ten minutes give or take
    FCause (133211@1)I just don't foresee myself getting drowsy
C (x32010@1)                GWhen (320003@1)cold integrity keeps me wide awake

(C-Am-G-C)
(Awake, awake, awake, awake...)

Get me out of this cavern or I'll cave in
(Cave in, cave in, cave in, cave in...)

Get me out of this cavern or I'll cave in
(Cave in, cave in, cave in, cave in...)

F C F-Dm-G (2X)

I'll keep my helmet on
Just in case my head caves in
(In case my head caves in)
Cause if my thoughts collapse
Or my brain work snaps
It'll make a mess like you wouldn't believe
Tie my handle bars to the stars
So I stay on track (so I stay on track)
And if my intentions trail I'll wrench them away
Then I'll take my leave and I won't even look back

(C-Dm-F-G)
I won't even look back

Any correction would be appreciated