Lance Stroll says he couldn't stay inside his Williams to do a VSC lap as "there was some burning in my feet."
In the immediate aftermath of FP2 at the Sakhir circuit, Stroll was told to stay out for another lap as the drivers ran under a Virtual Safety Car situation.
He replied: "I can't do it because I'm in so much pain."
The rookie was quickly into the pits and out his car.
He later explained: "There was some burning in my feet, I don't know if something was wrong. I was burning like crazy.
"I need to see what it was but I had to get out of the car because it was just killing me. I just wanted to get out of there.
"I needed to jump out of the car, it was really, really painful.
"I tried to bring it to the end but then when I was told to do another lap for the Virtual Safety Car I said I really cannot do it, sorry."
— WILLIAMS RACING (@WilliamsRacing) April 14, 2017
Stroll also lacked pace in Friday night's session with his best time, a 1:33.361, over a second slower than his team-mate Felipe Massa.
"I didn't feel comfortable all of FP2 with the car compared to FP1," he said. "From the first session I was really struggling with the rear so we need to see what happened.
"Positives in FP1 and getting into the car and feeling good, but FP2 we need to see what happened. It was a bit of a bizarre session."
Enjoy the full experience of the upcoming 2017 FIA Formula One season on FOX Sports Play, where you can catch LIVE races from angles unseen before, exclusive interviews, behind the scenes, in-depth analysis and so much more. Don’t miss it!