Millennium Bridge, London people walking caused small sideways oscillations in the bridge, which in turn caused people on the bridge to sway in step, increasing the amplitude of the bridge oscillations and continually reinforcing the effect. On the day of opening, the bridge was crossed by 90,000 people, with up to 2,000 on the bridge at any one time. Resonant vibrational modes due to vertical loads (such as trains, traffic, pedestrians) and wind loads are well understood in bridge design. In the case of the Millennium Bridge, because the lateral motion caused the pedestrians loading the bridge to directly participate with the bridge,
The London Bridge Experience attraction is optional and only suitable for children over 11 years old. Younger visitors can request a child-friendly "Guardian Angel tour". The London Bridge Experience is also home to "Phobophobia", a Halloween show, that runs throughout October every year. The London Tombs have won the Screamie Award for being the United Kingdom's "Best Year Round Scare Attraction" for the years 2009–2016 The London Bridge Experience has been nominated by Group Travel Organiser as a finalist for "Best Attraction for Group Visits". Other finalists included: Buckingham Palace, the London Eye, St Paul's Cathedral, and the Houses of Parliament. The London Bridge