  Theories with compact extra spatial dimensions felt only by gravity are
subject to direct experimental tests if the compactification volume is large.
Estimates of high-energy collider observables induced by graviton radiation
into extra dimensions are usually given assuming rigid branes. This may
overestimate the accessibility of these theories. Brane fluctuations soften the
coupling of graviton radiation, and reduce our ability to see effects in
high-energy collisions. We calculate the size of this suppression on single jet
plus gravitons at the LHC and single photon plus gravitons at an e+e- linear
collider. We advocate the use of a brane softening variable as an additional
parameter when comparing theory predictions to data.
