After watching Starship Troopers with friend Jeff Oberst Monday, Adam Buck vowed never to watch another science-fiction film with the Rice University physics professor. 'First, he spends 20 minutes telling me how bugs could never get that big because of the way they breathe,' said Buck, 28. 'Then he goes off on how faster-than-light-speed travel isn't physically possible.' Buck said the evening was even less enjoyable than the time they watched Back To The Future together. 