LONDON, June 29 — One of the highlights for any first-time traveller to London is a visit to Buckingham Palace.

Tourists often try their best to make the stoic soldiers that guard the official residence of Queen Elizabeth flinch, but one man took his attempt too far.

In a video, his friends can be heard giggling as the tourist marches alongside a soldier before resting his hand on his shoulder.

Watch what the soldier does next that wipes the smile straight off the tourist’s face.

This tourist was taught a lesson he won’t soon forget by a member of the Queen’s Guard.