Bellavista Man (User) correctly  
identified this in the solo to the '91 4500 Times. 

E|--------------------------------------------------------| 
B|--------------------------------------------------------| 
G|--------------------------------------------------------| 
D|-----5------------5---7-5--------5------------5---7-5---| 
A|-7-7---7-5-7--7-7---7-----7--7-7---7-5-7--7-7---7-----7-| 
E|--------------------------------------------------------| 

This riff is used throughout the melody at different speeds. 
Chords consist of Em, D and possibly A and B