For this first trial, you have to grab the glowing sphere and guide it across the glowing track. This is harder then it sounds, especially on the last one with that one part of disappearing track.
To get the Get A Grip Achievement, you have to have to guide it across without the orb turning red for even a millisecond. This takes a lot of practice and patients, but it cant be done. SAVE before you start the trial, and if you mess up, pause and change your costume. This will set you back at the start of the trial. This video is from our unofficial game guide. You can view the full guide here