To disable the very annoying feature that keeps scrolling even after you let go of the touchpad, run the following command:
<code>
synclient CoastingSpeed=0
</code>

Instead of "Coasting", I vote that the feature is renamed to "Drunk emulator".

Source: [[https://help.ubuntu.com/community/Lubuntu/Mouse#Disable_coasting_.28scrolling_after_release.29]]