They both begin a trip at the post!
Because you don't know who is going to make it to the end.
Envelope
Shneakoff (I apologise, this is my first ever post so I'm using that as my excuse)
Tequila Mockingbird. (X-post)
Eleven. T-H-E A-L-P-H-A-B-E-T.
A letter from an ISP saying they've been downloading illegally.
To trip up low-flying aircraft.
The ability to tell a person to go to hell in such a way that they look forward to the trip.
Because bad news travels fast!
A racehorse because it can take hundreds of people for a ride at once!