  We propose a test to compare the speed of muons and muon neutrinos produced
in the same bundles in the atmosphere. By comparing the arrival times of
primary muons and muons induced by neutrinos, experiments such as
Super-Kamiokande, IceCube and ANTARES could verify recent hints on the
possibility that neutrinos have a velocity larger than the speed of light. For
smaller detectors such as MINOS and OPERA, where it may be challenging to
recognize downgoing muons induced by neutrinos inside the active volume,
another measurement may be possible thanks to the ns-time resolution. The
arrival times of muons in a bundle produced by one cosmic ray interaction in
the atmosphere should return a value compatible with the time resolution, while
if neutrinos have larger velocity than muons some of the muons may arrive
slightly earlier in a bundle of particles than others.
