Jorge Lorenzo escaped serious injury when he crashed out of the San Marino MotoGP but was left fuming as he lost ground to Valentino Rossi in the title race.
In mixed weather conditions, Sunday's race at the Misano circuit began on a dry track only for the rain to come down.
That sent riders scurrying back into the pits to change to bikes with wet set-ups and wet tyres.
Laps later, though, is began to dry out and the field again pitted, this time for bikes set up for the dry.
That was where Lorenzo's race ended.
Pushing hard on his out-lap as he battled Rossi and Marc Marquez for the win, he went down.
"Luckily I was fine after the crash," Lorenzo revealed. "But I was a little bit worried, because my hand was getting bigger, and also my head suffered a lot of blows.
"For some minutes I didn't see perfectly, but now I feel good. This is one of the positive points."
One of the negatives, though, is the rules.
The Yamaha rider was unimpressed at having to race on a damp track on slick, saying the rules should focus on rider safety rather than television time.
"The thing that we have to avoid is riding on slicks in the wet. It's very, very dangerous, and only the riders on the bikes know how dangerous it is.
"It's the worst thing in our sport, in my opinion, it's the only thing that I would say in terms of safety because it's very dangerous. As with my crash, it was plain.
"I don't know if it's because of television rights or something like that, that they changed this rule."
Lorenzo's crash coupled with Rossi's fourth-placed finish means the two team-mates are separated by 23 points heading to Aragon, the fifth last event on the calendar.