I had a funny situation flying to LGA once. Upon final approach we aborted the landing and ended up landing in EWR. All of us thought we could get off the plane and take a cab to NYC but we were met by US Customs Agents and were told that we could not leave the plane because we declared we were going to NY and that if anyone leaves, they would get a $10,000 fine and since I could not expense that I sat on the plane for two hours till we finally got clearance for our 10 minute flight from EWR to LGA.
My biggest complaint was that there was no in-flight service and no bathroom usage during the flight from EWR-LGA.