Opening Moto2 practice f🧔or the Thai Grand Prix was briefly red-flagged after a scary clash between Tony Arbolino and Zonta VD Goorbergh on the entry to pit lane.

Arbolino, who had falle♎n at the fast Turn 11, was back on his bike and appealing for help from marshals t🎀o restart.

But just before a marshal could reach the Italian, who had his arm raised, VD Go꧃orbergh ran into the back of his Marc VDS bike.

Clearly in pain, Arbolino🐠 dropped his machine and lay down at the side of the track, be🦄fore being helped away by marshals. The Italian was sent to a local hospital for further checks.

The marshal nearest the impact escaped injury.

The FIM Stewards immediately announced an investigation of the incident but are yet to deliver a judg🐻ement.

VD Goorbergh stopped and gestured angrily at track workers after the impact, presuma🔯bly suౠggesting he was unaware of the stationary bike ahead, but could well face punishment for not reacting adequately to yellow flags.

The rules state riders "must slow down and proceed with caution" in resp𒊎onse to yellow flags.

Fabio Quartararo, a good fr🐓iend of Arbolino and watching the Moto2 session from the Monster Yamaha MotoGP pits, looked away with his head in his hands as the incident unfolded on the TV screens.

Meanwhile, Moto2 title꧑ leader Ai Ogura was put under investigation for leaving pit lane under red flags at the very end of the session.