  Geodesic probes in certain horizonless microstate geometries experience
extreme tidal forces long before reaching the region where these geometries
differ significantly from the extremal BTZ black hole. The purpose of this
paper is to show that this behavior is a universal feature of all geometries
that have a long BTZ throat that terminates in a cap, regardless of the details
of this cap. Hence, incoming probes will scramble into the microstate structure
before they encounter the region where the charges of the solution are sourced,
and the reason for this premature scrambling is the amplification of tiny
geometrical deviations by the relativistic speeds of the probes. To illustrate
the phenomenon, we construct a new family of smooth horizonless superstratum
microstate geometries, dual to D1-D5 CFT states whose momentum charge is
carried by excitations on CFT strands of length $k$. We also show that, in the
large-$k$ limit, these new superstrata resemble a blackened supertube solution
everywhere except in the near-supertube region. Thus they resolve the
singularity caused by the naive back-reaction of modes with non-linear
instabilities near evanescent ergosurfaces.
