Terrifying Crash At British Grand Prix

Alfa Romeo driver Zhou Guanyu was involved in a massive accident during the first lap of the British Grand Prix on Sunday -- flipping his car and skidding before tumbling over the tire barrier -- but miraculously, he escaped without serious injury.

The crash happened moments into the race ... when Alpha Tauri's Pierre Gasly tried to squeeze between Zhou and Mercedes' George Russell ... making contact with Russel, who then bumped into Zhou.

Russell spun out as a result of the incident ... and as soon as a red flag was declared, he jumped out of his car and ran over to Zhou to see if he could help.

23-year-old Zhou -- F1's first Chinese driver -- was removed from his car and stretchered off the…