A friend of a friend who works in the film industry (wow, how many times has a bullshit story started with that line anyway?) provided this amusing
Barton Fink-ish anecdote about the man she classified as "the biggest asshole in
Hollywood". You might think that's exaggeration, but she also had contact with
Shatner (by way of working in the same offices as his manager) so perhaps not...
During talks for Under Siege it came up that Seagal's character (as originally written) was to be diabetic -- creating an added level of tension. When asked how he would portray this weakness Seagal answered simply:
"I'll wear a hat."
His manager echoed
"He'll wear a hat."
This sparked much talk amongst the writers as to what kind of hat he could possibly wear. Eventually the whole script was rewritten to "accommodate" Seagal.
The same source also indicated that Seagal routinely roughed up and intimidated anyone who talked to his girlfriend (who was often present with him on the set).