Here is what I have for Ambulance
First Part basically just repeats until 1:42 - this is how I've been playing it but it probably isn't the easiest way.
E----------------------------------------------------------------------------
B----------------------------------------------------------------------------
G-----5--------4-------5-----------------------4-----------------------------
D-------------------------------7-----7-----------------5--------7-----------
A--7-----5-------5--0-----5--------------5--------5--------5-----------------
C-----------7----------------5-----5--------7--------4--------5--------------
OR - this way may be a lot easier - p = pulloff
E----------------------------------------------------------------------
B----------------------------------------------------------------------G----------------------------------------------------------------------
D-----10-p0-----9-p0------10-p0-----7------7-p0-----9-p0----5-p0-----7-
A--7-------------------------------------------------------------------
C------------7---------9----------5-----5--------7--------4-------5----
There might be a better way that I am just completely overlooking. Let me know if you think there is.
Second Part repeats from 1:42 until 2:50 - it goes something like this
If this is a joke.....
E-------------------------------------------------------------------------
B-------------------------------------------------------------------------
G----9----------7---------9----------5-----5--------7---------4--------5-
D----10---------9---------10---------7-----7--------9---------5--------7-
A-------10--------10---------10--------------5--------10--------5--------
C-9----------7---------9----------5-----5--------7---------4--------5----
OR possibly like this - p = pulloff
If this is a joke.....
E------------------------------------------------------------------------
B------------------------------------------------------------------------
G----9-p0-------7-p0------9-p0------5-----5--------7---------0---------5--
D----10---------9---------10--------7-----7-p0-----9-p0------5-p0------7--
A------------------------------------------------------------------------
C-9----------7---------9----------5-----5--------7--------4---------5----
The rest of the song seems to be a variation of this. I'm too lazy to tab it out now...will do it later if requested.