According to Official Guinness Records,
The fastest time to pull 20 Christmas crackers by a team of two is 16.26 seconds and was achieved by Raymond 'US Ray' Butler (USA) and Stephen 'Sizzlin' Steve' Kish (UK) in Glasgow, UK, on 27 November 2016. The record attempt took place in the BBC Scotland studios for the filming of 'Officially Amazing' series 6.
For a complete list of 2016 records, please visit 2016 Guinness Records in United Kingdom.