Final answer:
Handling Nonel tubing during initiation poses a physical hazard due to the small explosion used to transmit a shock wave to the detonator, which can result in burns or other injuries. Safe handling procedures must be followed to avoid extreme physical danger.
Step-by-step explanation:
There is indeed a hazard associated with holding or being in close proximity to Nonel tubing when it is initiated. Nonel, which stands for Non-Electric tubing, is a shock tube used for detonating explosives and is considered a safer alternative to electrical detonators. Despite this, when Nonel is initiated, it generates a small explosion to transmit a shock wave along the tube to the detonator, which then initiates the explosive. Physical danger may be present if one is holding or close to the Nonel tubing at this time, as the initiation could result in burns or other injuries. Therefore, proper safety precautions must be taken to avoid any extreme physical danger. This includes ensuring a safe distance, wearing appropriate protective gear, and following precise handling instructions and protocols.