Tune down half step
You can extend the riff as much as you want to milk laughs.
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--------3----------------3----------------|
----4-----4---4------4-----4---4----------|
--4---4-----4------4---4-----4------------|
2----------------0------------------------|
------------------------------------------|
------------------------------------------|
--------3----------------3-----3-----3----|
----4-----4---4------4-----4-----4-----4--|
--4---4-----4------4---4-----4-----4-----4|
------------------------------------------|
3----------------2------------------------|
For the final part, I switch to chords and play as epic a manner as possible.
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-4----2---------------------------------|
-4----2----5-----4----------------------|
-2----0----5-----4----------------------|
-----------3-----2----------------------|