Going around the loops without flying off is tricky and requires careful balance.
When you reach the turnabout (the funnel at the far end),
time your jump carefully so that you don't reach the top of the funnel too early or too late.
You want to have your feet come into contact with the final glass runway as early as possible,
as this will allow you to spend the most time accelerating on the glass runway. To do this,
time your jump at the bottom of the funnel so that you bump your head against the brown wooden
overhang (at the top of the funnel) slightly before the beginning of the glass runway.