Actor Ajay Devgan's stunt of standing on two moving bikes in "Golmaal - Fun Unlimited" has been performed after a lot of practice and should not be imitated, warns its director Rohit Shetty.

Shetty warned fans that it could be unwise to carry out similar stunts.

On Thursday night, a group of young boys were caught performing the same stunt at Bandra by the police. The stunt could have proved fatal.

"I request my audiences not to try these stunts as they are performed with sheer practice and guidance," said Shetty.

The comic caper, releasing Friday, also stars Arshad Warsi, Sharman Joshi, Tusshar Kapoor, Rimmi Sen and Paresh Rawal.