Man, I have those in my own company. The sales guy that walks up to your desk and starts chatting about 20 minutes about a potential future customer.

Then a few days goes by and the customer buys our product and it very clearly states in the contract that 15 things will be done by yesterday even though it will take a good 100 hours to fix and the customer doesn't have to pay a dime, because it's "evolving the product".