  We report here on a detailed study of a c-type RR Lyrae variable (RRc
variable), SB 796, serendipitously discovered in a search of the WASP public
data for stars that display large photometric periodic modulation. SB 796
displays a period of $P = 0.26585$ d and semi-amplitude of $\sim$ 0.1 mag.
Comparison of the modulation shape and period with the detailed analysis of LMC
variables indicates that SB 796 is an RRc variable. Gaia DR2 classification
corroborated our result. Radial-velocity (RV) follow-up observations revealed a
periodic variation consistent with a sine modulation, with a semi-amplitude of
$5.6\pm0.2$ km/s, and a minimum at phase of maximum brightness. Similar
amplitude and phase were previously seen in other RRc variables. The stellar
averaged RV is $\sim 250$ km/s, turning SB 796 to be a high-velocity star,
while its present position, as derived from the Gaia astrometry, is at $\sim
3.5$ kpc below the Galactic plane. Integration of the stellar Galactic motion
shows that SB 796 oscillates at a range of 0.5--20 kpc Galacto-centric
distance, passing near the Galactic center about three times in 1 Gyr. The
Galactic radial motion takes SB 796 up and down the plane to a scale height of
$\sim 10$ kpc. During its $\sim10$ Gyrs estimated life time, SB 796 therefore
passed $\sim 30$ times near the Galactic center.
