Looks like some folks might want to re-read GCR 6.8.3. As an SIT, if I had seen this from the tower (which is admittedly difficult because of the pit wall hindering line of sight in this case), I would have certainly reported it to the Chief Steward. It would then be his/her call to issue a CSA (Chief Steward's Action).

Essentially it says if you leave the pavement during competition and gain an advantage, said advantage can be rescinded by the Chief Steward. This applies at the start as well.

MC