You crawl faster when you exit one high water into a one high tunnel whilst holding ctrl.

When you exit one high water whilst holding Ctrl into a one-high tunnel, you will go faster than you could normally. (Context: When crawling, if you hold Ctrl, nothing happens.)

Steps:

Step 1: Dig a long 1 high tunnel

Step 2: Put water at the end of the tunnel and let it flow

Step 3: Swim in the water

Step 4: Exit the water

Expected result:

On exiting the water, you would go back to crawl speed.

Actual result:

On exiting the water, you go quick.