Hydraulic Propulsion

Hydraulic Propulsion (水圧推進) is a Common Skill used by Rimuru Tempest. It uses pressure to create a powerful water jet that can propel its user through vast distances.

Description
After falling underwater, Rimuru (unnamed at the time) had the idea to swallow a large amount of water to try and propel himself out and onto dry land by discharging it like a water jet. After filling a percentage of his Predator's "stomach" with water, Rimuru ejected the water all at once, acquiring the skill and flying out of the water.