  We analyze the cosmological consequences of locked inflation, a model
recently proposed by Dvali and Kachru that can produce significant amounts of
inflation without requiring slow-roll. We pay particular attention to the end
of inflation in this model, showing that a secondary phase of saddle inflation
can follow the locked inflationary era. However, this subsequent period of
inflation results in a strongly scale dependent spectrum that can lead to
massive black hole formation in the primordial universe. Avoiding this
disastrous outcome puts strong constraints on the parameter space open to
models of locked inflation.
