I might would have gone, but it rained.

source: 
LAGS
Entry: 
574
Example: 
I might would have gone, but it rained.
Modal 1: 
might
Modal 2: 
would
Gender: 
Female
Race/Ethnicity: 
Black
Age: 
63
Level of Education: 
4th grade and vocational program
Home Community, Town, or State: 
GA (Barnesville)
Location Collected: 
GA (Jackson)
Year: 
1973
Relation to Addressee: 
subject to fieldworker
Medium: 
Spoken
Sentence Structure: 
1.1
Status: 
Naturalistic