My dad showed me how to do this and me and him have caught some fat fish with it. Works best in trout streams.
Step 1: What you need
Hitch hiker (spring thing)
Step 2: The first part
Screw in the hitch hiker.
Step 3: The second part
Squish in the weight. You can experiment with different weights in different places.
Step 4: The third part
Tie the line to the hitch hiker and tie the other end to the hook, And stick the hook through the minnow. The line in beetwen the hook and the hitch hiker has to be the right length. Look at the picture to know how much slack to leave.
Step 5: Gone Fishin'
Now twitch it through the water and have fun!