What is one danger of diving into a siphon?

Diving into a siphon can create unique challenges related to gas consumption, particularly during the ascent and exit phases of the dive. A siphon often involves sudden changes in water flow and pressure, which can lead divers to use more gas than anticipated due to these dynamics. When exiting a siphon, divers may need to swim against strong currents or navigate through tighter passages, which requires increased effort and can significantly elevate gas consumption.

Understanding this aspect is crucial for planning a dive and ensuring that divers carry enough gas to safely exit the siphon. While the other choices touch on valid concerns associated with diving, they do not directly relate to the immediate and practical implications of a siphon's effect on a diver's gas management and overall safety.