So, your on your United Flight ready for vacation. About ready to take off and your single serving friend sees something pouring out of a wing. Concerned, you ask the flight attendant what the liquid pouring out of the plane wing is... she says Not to worry about it, "it's normal". The passengers made a stink about it and then the flight crew noticed it.

The plane was grounded and taken out of service immediately. You know,  just before it was about to take flight from Newark to Venice?

 

(Via: Business Insider)