Other mistake: The article on the right-hand side of "The Olympian" seen at the end of the film is the same one seen on the right hand side of the "Daily Journal of Commerce" that Tracy looks at after chopping down the tree. Although the 2nd column of print in the "Daily Journal of Commerce" is now the 1st column of print in "The Olympian."
Other mistake: When we see the front page picture of Mike with the alcohol and joint, he's pouring the alcohol over his bottom lip and chin, going down the front of his shirt. This doesn't match what we see him do. It does appear that Mike spilt alcohol on himself when off camera, but the wet spot is on the right side of his jacket, but not down the front.
Answer: Chris Farley weighed over 300 pounds. His jacket would have torn long before the plane took off.
Brian Katcher