The Movie: In one of the first scenes of the movie, Alan Grant (Sam Neill) and Ellie Sattler (Laura Dern) casually brush off a complete dinosaur skeleton which appears to have been just hanging out on a hillside, begging for attention. One of the diggers actually roots around in the dinosaur's nasal cavity which, as Brian Switek mentions in his fantastic article about this error, is likely the only time in film history that someone has picked a dinosaur nose.
Real Life: Much to the chagrin of paleontologists, dinosaur bones aren't easy to find or unearth. It can take months to find a protruding bone, and as illustrated in this picture of a dinosaur femur, most fossils are encased in hard rock. They need to be carefully chiseled, hammered, or even exploded from their surroundings. Dinosaur nose-picking is also completely out of the question.