Random search result

[Evgeniy Strokin]

I want to get sample from my search result. Not first 10 but 10 random (really 
random, not pseudo random) documents.
For example if I run simple query like STATE:NJ no order by any field, just the 
query and get 10 first documents from my result set, will it be random 10 or 
pseudo random, like first 10 indexed or something like this? 
 
Thank you
Gene