Watch three grannies smoke marijuana for the first time - their reactions may surprise you

Timelapse clip shows the effect of weed on the three OAPs who document their first experience of the drug

A funny video showing three grandmother's smoking marijuana for the first time hasdriven the internet potty.

The clip, which has gone viral, was recorded in Washington State, in the US, where the recreational use of the drug has been legalised.

The three grans share a bong as an observer watches how the react to different challenges, including playing jenga and card games.

After just 5 minutes, the trio are noticeably more relaxed and giggly.

Friendly fun: The trio were surprised to enjoy the experience

And by 40 minutes, their eyes are clearly gazed over as the struggle to stop laghing.

The first gran says: "When I did it my muscles in my neck seemed not as tight. I am seeing lots of benefits for it" - to which the second gran replies: "I totally lost track of what you were talking about."

The third grandma then adds: "I think I inhaled more but I don't feel as high as they look to me."

They they then tuck in to some munchies, before the film ends with the message: "No grandmas were harmed in the making of this video."