Hang on

Sometimes it can be
a roller coaster, 
with long,
flat stretches like a freight train
- boring, but then up come
the humps 
and down go
the screamy parts, sometimes
even all the way down
and further: into and through 
subterranean tunnels
- banking hard 
left and right, slide 
- slam, shoop -
breaking the surface 
into loop-di-loops and all
sorts of twists that surprise.
It
can be like 
ferris wheels, too,
tilt-a-whirls,
bumper cars.

All kinds of rides. Life

can be like that, 
especially at amusement parks.