Cops are REALLY wanting to talk to Lindsay Lohan … NOW!!
A witness, who comes from the alleged assault victim's side of the story, is telling police Linds was the one who instigated the now infamous fight at the Standard Hotel!!
According to her, it was all over a "bump!"
While LiLo and Marisa Dugas sat in neighboring booths a few weeks back, the witness claims Lindsay tapped Marisa and said, "Did you bump me?"
Marisa of course denied it and pinned the blame on a man in Lindsay's group — her father, Michael Lohan — to which Lindsay replied, "That's my dad! Why would he bump me?"
The girl shot back, "You go clubbing with your dad!?!"
(No, srsly, she was hanging out with her dad??? Doesn't she avoid him???)
And that's when things got UGLY!!! The witness says