When Mr. Burns is caught illegally storing excess nuclear waste, he's forced to award the town $3 mllion. Traveling salesman, Lyle Lanley (Phil Hartman) convinces the town to spend the money on a monorail.
Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side! Man: (From inside a bathroom stall.) That's a right triangle, you idiot! Homer: D'oh!
Mr. Burns: Men, there's a little crippled boy sitting in a hospital who wants you to win this game. I know because I crippled him myself to inspire you. Milhouse: (to his mom and dad) I hope they win, or Mr. Burns said he's coming back.