To expand on Epsilon's mention of the B:tVS/Potter/Star Wars fic (Jedi Granger): The initial crossover has Hermonie's parents being Xander and Dawn.
Xander while doing some shopping in Diagon Alley is jumped by some DEs, whom Xander defeats with a 'lightsaber' built by Andrew in his role as
'Q' for the Watcher's Council. Xander claims to be a jedi and introduces the Aurors to the 'documentries' produced by a Mr Jucas as
evidence.
Things start to rapidly snowball from there.
___________________________
"I've always wanted to be somebody, but I should have been more specific." - George Carlin
Xander while doing some shopping in Diagon Alley is jumped by some DEs, whom Xander defeats with a 'lightsaber' built by Andrew in his role as
'Q' for the Watcher's Council. Xander claims to be a jedi and introduces the Aurors to the 'documentries' produced by a Mr Jucas as
evidence.
Things start to rapidly snowball from there.
___________________________
"I've always wanted to be somebody, but I should have been more specific." - George Carlin