  Many features of the Very Long Baseline Array (VLBA) contrive to make it the
best telescope for pulsar astrometry. The measured proper motions and
parallaxes allow distances and transverse velocities to be determined. These in
turn provide clues to questions spanning nuclear astrophysics on scales of
10^-23 m to the distribution of gas in the Galaxy on scales of 10^20 m. Three
pulsars are discussed in this paper. Among pulsars, B0950+08 has the most
accurate VLBI-determined parallax. B1133+16 has a very high transverse
velocity; its radial velocity is discussed. B0656+14 is a thermally detected
neutron star. Determination of its distance has allowed its radius to be
measured and its association with the Monogem ring supernova remnant (SNR) to
be established, allowing a long-standing question in cosmic ray astrophysics to
be addressed.
