In 116 years of racing at the Tour de France, riders have done all sorts of bizarre things, from jumping on trains to fighting with fans at mountain stops.
But rarely have they just vanished in the middle of a stage like Australian rider Rohan Dennis did during the first Pyrenean stage on Thursday.
For a couple of hours on an otherwise uneventful day in the mountains, nobody was able to say where the time trial world champion had gone.
His Bahrain-Merida team even sent an alarming message out on social networks, saying all it cared about was "the welfare" of Dennis after Tour organisers announced he had pulled out of the race.
🇫🇷 #TDF2019— Team Bahrain Merida (@Bahrain_Merida) July 18, 2019
Our priority is the welfare of all our riders so will launch an immediate investigation but will not be commenting further until we have established what has happened to @RohanDennis.
Meantime we continue to support our riders who are mid-race.
The Australian ultimately resurfaced at the finish line in Bagneres-de-Bigorre, where British rider Simon Yates, the reigning Spanish Vuelta champion, posted his first stage win after a long breakaway that did not shuffle the overall standings.
Dennis was spotted near the Bahrain-Merida team bus after the stage, but did not make any comment about his decision to pull out.
"We are also confused," Bahrain-Merida team director Gorazd Stangelj said.
"It was his decision today to stop at the feed zone. We tried to speak with him, he said 'I just don't want to talk,' and abandoned the race."
Mass confusion over Dennis’ withdrawal
Dennis quit with about 80km left before the two big climbs in Stage 12, prompting Bahrain-Merida to open an investigation.
According to the French TV station broadcasting the race, Dennis had an argument with officials in the team car.
Stangelj said Dennis' condition was good enough to perform, adding he was not aware of any kind of argument that could have triggered the rider's decision.
Dennis's withdrawal was even more surprising as it came a day before Friday's short time trial in Pau, where, given his time trial pedigree, he would have been an obvious favourite alongside defending Tour champion Geraint Thomas.
Stangelj was not aware of any complaint from Denis in regards with his time trial equipment and also dismissed suppositions that Dennis could have been frustrated with his role in the team.
Bahrain-Merida's main goal at the Tour this year was to fulfil former Tour champion Vincenzo Nibali's ambition to fight for a podium finish.
"I never asked him to bring the water bottles in the race," Stangelj said.
"Actually, I even told him yesterday and today that he should save energy for the time trial."
When asked if Dennis had been difficult to work with before, Stangelj said: "it's difficult to answer this question."
"But I never have hard discussions with him," he insisted.
"We always found a solution when it was needed."
Stangelj explained that after Dennis stopped at the feed zone, he was not immediately able to reach out to him because he had already passed that point on the route and could not turn back with his car.
He finally managed to get his rider on the phone after another car from the team arrived next to him.
What a scary tweet, hope everything is fine? Would your focus not have to be on a rider that is apparently missing in stead on the riders that are well in the race?— Arjen Vervoort (@ArjenH2Os) July 18, 2019