title: Roblox touch event on a block only for feets
body: <p>I am learning Lua and Roblox and testing my first scripts.
  I would like to know the right method to manage the <strong>touch event</strong> when the character touch a block with his feet, <strong>(whether walking or jumping)</strong></p>
  
  <pre><code>local function onTouch(hit)
      if hit ~= ??user.legs?? then 
          return 
      end
      -- exemple of action
      if hit.Parent.Humanoid.JumpPower &lt; 150 then
          hit.Parent.Humanoid.JumpPower = hit.Parent.Humanoid.JumpPower + 5;
      end 
  end
  
  script.Parent.Touched:connect(onTouch)
  </code></pre>