58098
I saw a Japanese Instagram user's video where two people were on a plane.
(They were recording themselves with a phone's front camera.) At the end of
the video the other person said 「行ってきます」 repeatedly appearing to say bye to
the video's watchers.

I thought the phrase 「行ってきます」 was usually said in the context of home or the
workplace when expecting someone to reply in person. This usage here struck as
unusual to me. Is it really unsual or am I missing something?
CC BY-SA 3.0
2018-04-22T19:36:08.077
58094
2018-04-23T01:14:15.840
29671
question
word-choice phrases
Why was 「行ってきます」 used on video?
That would be a **completely** standard and natural use of the phrase. You do
not need to be at home or your workplace to say 「行ってきます」 to someone.

Basically, you only need to be going from Point A to Point B to say it (as
long as Point A is "relatively" close to where you are usually found). In this
case, the two persons must be going away from their own town, correct? If so,
their own town would be Point A.

Sometimes when I am going from home to another place by bike, my neighbors
stop me to say hi. They ask where I am headed to and I reply, for instance,
"To the mall." Then, they often say 「行ってらっしゃい」, to which I naturally reply
「行ってきます」. Note that this conversation is taking place on the street, and not
at my home.
CC BY-SA 3.0
2018-04-23T01:14:15.840
58098
2018-04-23T01:14:15.840
58094
answer