: A State of Trance Episode 138 , which aired in 2004 (though the "138" brand itself became a separate movement years later).

: A sub-label of Armada Music dedicated specifically to "uplifting trance" and faster 138 BPM tracks.

The query "Armin Van Buuren Who's Afraid Of 138" can refer to a few different things within the world of trance music:

: A recurring special episode of the A State of Trance radio show and a dedicated stage at major festivals (like ASOT 900) focused on the faster side of the genre.

: A high-energy song by Armin van Buuren originally released on his 2013 album, Intense .