Back to the Future theme intro:
I know it's not properly accurate to the orchestral one, but it's recognisable.
If you know the tune or the film you'll be able to work out reasonable timing. If not, 
out the original track for an idea.
Standard Tuning:

e|---------------------|-----------------|------------------------------|
B|---------------------|-----------------|------------------------------|
G|---------------------|-----------------|-5---/4-5-7-5-2---4-5-7-5---5-|
D|/3--2-0-2-0----0-----|/3--2-0-2-0----0-|---3------------3---------5---|
A|------------3--------|------------3----|------------------------------|
E|-----------------3---|-----------------|------------------------------|

e|---------------------|
B|/8-8-7-5-7-/8--------|
G|---------------------|
D|---------------------|
A|---------------------|
E|---------------------|

/ =  Slide up