How to use the Curvature tool to only make one line.

Hey everyone,

I'm currently practicing my skills using the curvature tool. I've run in to an issue that I can't find the answer to anywhere. I just want to make one line with the tool instead of a whole shape. How do I end the path once i've made a line? Because it always latches on like this whenever I try to move away:

I want the line to end where the red circle is, but as you can see the tool keeps going where the arrow is pointing.