the camera on the angled ice fall, de ruydts uses fastened tennis balls to the leg of each tripod, such that the felt sticks to the ice. led lights were used to illuminate the cave for the video shoot. the episode was released on may 7, 2018. it runs for 52 minutes and is rated g - general on the canadian home video rating system. etymology the name booming ice chasm refers to both its characterisation as an ice cave and the quality of sound created by its physical structures. the ‘booming’ is derived from the acoustics of the cave. the relative hollowness of booming ice chasm creates a closed system chamber which not only amplifies all sounds but creates a ringing echo affect. this renders conversing in normal tones inside the cave very difficult. as a result, communication and radio usage is limited to a whisper and necessary syllables only.