  We present a spectroscopic analysis of an extremely rapidly rotating late
O-type star, VFTS102, observed during a spectroscopic survey of 30 Doradus.
VFTS102 has a projected rotational velocity larger than 500\kms\ and probably
as large as 600\kms; as such it would appear to be the most rapidly rotating
massive star currently identified. Its radial velocity differs by 40\kms\ from
the mean for 30 Doradus, suggesting that it is a runaway. VFTS102 lies 12 pcs
from the X-ray pulsar PSR J0537-6910 in the tail of its X-ray diffuse emission.
We suggest that these objects originated from a binary system with the
rotational and radial velocities of VFTS102 resulting from mass transfer from
the progenitor of PSR J0537-691 and the supernova explosion respectively.
