The good news ... Wallace has recovered and late Sunday night, he issued a statement on Twitter.
"Got sent to the Gulag ... Won that ... Where we dropping. Aka I’m good."
So, what happened?
Earlier in the broadcast ... Wallace had said he felt "lightheaded" -- insisting he had "sat down and got up too fast."
Wallace -- the only black driver who competes in the NASCAR Cup Series -- made headlines before the race by wearing an "I Can't Breathe" shirt, a show of support to George Floyd.
NASCAR President Steve Phelps also spoke about racial issues -- after all 40 drivers had pulled over and turned off their engines during warm-up laps, Phelps delivering a message over their radio sets.
"Our country is in pain and people are justifiably angry, demanding to be heard," Phelps said.
"The black community and all people of color have suffered in our country, and it has taken far too long for us to hear their demands for change. Our sport must do better. Our country must do better."