Launch control with sport traction, felt a jerking sensation about a quarter of a second after shifting from second to third gear. This log records the second time this happened, the first time it happened (about 10 minutes before the log), it was the same conditions (sport traction + launch control) and I felt the jerking sensation. I just logged it because I found it peculiar and any help as to finding out what is causing it would be appreciated. The second pull was WOT in 3rd gear with TC off but I must have hit the kickdown since it went into second.