The 40-year-old former wrestler sprang into action when the youths tried breaking into vans containing expensive equipment in Hackney, East London. The Rock — real name Dwayne Johnson — was dressed as an FBI agent while filming The Fast and the Furious 6 in a neighbouring warehouse and caught sight of the thieves trying to force locks. When he clocked what was happening, the 6ft 5ins, 20-stone star left filming in the middle of a battle sequence and charged at the hoodies waving his fake police badge. The youths were so shocked that they stopped what they were doing and fled empty-handedA source said: "It was so funny. The Rock looked like an action hero because he had his flak jacket on and an FBI badge in his hand. All of a sudden there was loads of gunfire and this giant dressed as a copper was about to mow them down. The lads jumped out of their skin and scarpered down the canal path and left the crew in peace. "It was like the Only Fools Batman sequence — they must have thought they were in the middle of a real-life action movie. "Now the crew are joking that they should drop security and just have The Rock do it.”