  A toy-model is studied, which considers two flat directions meeting at an
enhanced symmetry point such that they realise the usual hybrid inflation
mechanism. The kinetic term of the waterfall field features a pole at its
Planckian vacuum expectation value (VEV), as with $\alpha$-attractors.
Consequently, after the phase transition which terminates hybrid inflation, the
waterfall field never rolls to its VEV. Instead, it drives a stiff period,
where the barotropic parameter of the Universe $w\approx 1/2$ results in a peak
in the spectrum of primordial gravitational waves, which will be observable by
the forthcoming LISA mission as well as by Advanced LIGO.
