Would explain the lack of smoke in the main part of the venue in a video being shared
Another witness Jenny Brewster told MailOnline: ‘We were exiting the building when it happened. We’d headed towards the main doors as Ariana was performing the last song because we wanted to beat the crowds, but – as we made our way there - a wall of security men blocked it and told us to go the other way.
‘Seconds later they shouted ‘RUN!’ and the explosion happened right behind them. Hundreds of people were running and screaming. Those men saved our lives.’
Read more: http://www.dailymail.co.uk/news/article-4531940/Emergency-services-rush-Manchester-