Have laughed to myself over the years at the use of "momentarily" by customer-facing staff in different situations.
While we might say "in a moment" meaning in a short time, and momentarily has a similar meaning (for me it suggests for a moment), I've now heard it in two situations...
domain registration firm call centre message
"Your call is important to us, and please hold the line and we'll deal with it momentarily"
(definitely the opposite when trying to get their billing department to refund an overcharge!)
airline stewardess
"Please return to your seats and fasten seat belts as we will be landing momentarily"
(gave me visions of stopping on the tarmac and throwing people and their luggage off the plane as they can only stop momentarily!!)