Businessman recalls London Apollo Theatre horror Khalil Anjarwalla, a Kenyan businessman, was watching The Curious Incident of the Dog in the Night-Time with his pregnant girlfriend and her parents He described how chunks of masonry fell from above Mr Anjarwalla said the noises made him think to 'duck for cover' as he remembered being close to the Nairobi mall attacks in September Escaped: Khalil Anjarwalla, a Kenyan business owner, made it out of the Apollo Theatre with his heavily pregnant wife and her parents A theatre-goer who escaped a West End theatre with his family after its roof collapsed has spoken of the terrifying scenes inside, and also revealed that he was caught up in recent terror attacks on a Kenyan Mall. Khalil Anjarwalla was at the Apollo Theatre on Shaftesbury Avenue in central London when chunks of masonry began falling on the audience. He was in the upper circle of the theatre watching The Curious Incident of the Dog in the Night-Time with his his heavily pregnant wife and her parents. He managed to escape from the theatre safely after 'kilos of concrete plummeted from the ceiling'. Mr Anjarwalla said that his memories of being just outside the building, which was attacked by armed men from militant Somali group Al-Shabaab, killing many, led him to fear the worst. In that incident shoppers were forced to cower in fear as the masked men took over the mall, until they were forced out by the Kenyan military. He said: 'I was in the upper circle with my family when, about 45 minutes in, people started shouting and screaming. The 29-year-old, who is from Nairobi in Kenya, said: 'I was very close to the Westgate Mall which was the scene of the recent terror attack, so my first thought was instantly to check whether we should be ducking for safety. Mr Anjarwalla, who was visiting his in-laws with his English wife, Aliya, said: 'The actors just seemed to run from the stage. Rescue effort: Emergency services attending the scene at the Apollo Theatre on Shaftesbury Avenue He said some people seemed to be 'cut quite badly'. Police have said that seven people were seriously injured and that there were 81 walking wounded following the incident which happened at around 8.15pm today. Eyewitnesses have described the 'chaos and panic' as a theatre 'began to crumble down' around them, leaving scores of people injured. Eyewitnesses described how masonry from the Grade II-listed Apollo theatre in London's West End plummeted into the stalls below, striking members of the packed audience and filling the theatre with clouds of thick dust. A capacity audience of more than 700 people was inside the theatre, in Shaftesbury Avenue, which was 45 minutes into the National Theatre's performance of The Curious Incident Of The Dog In The Night-time when members of the audience started screaming as it appeared parts of the ceiling caved in. Jess Bowie, content editor of The House magazine, tweeted: 'Was just seeing "The Curious Incident" in the West End when the roof of the Apollo Theatre caved in. 'Don't know if anyone is trapped in there but people outside are covered in dust and some in blood. On the roof: Emergency services attending the scene at the Apollo Theatre on Shaftesbury Avenue Aid: Paramedics attend to an injured person at the scene at the Apollo Theatre on Shaftesbury Avenue Andrew Howard-Smith, 68, said: 'I saw the edge of the balcony come down, that's what I saw. It wasn't the whole of the balcony, just the front 2ft.' Libby Grundy, 65, said: 'There was a bang, and then a huge cloud of dust. I heard somebody on the stage say "Oh bloody hell," because they must have seen it. Terror attack: Mr Anjarwalla said the incident in the theatre made him fear the worst after he was caught up in attacks on the Westgate Mall in his hometown of Nairobi, Kenya Armed Confrontation: Members of the Kenyan military had to face down armed militants inside the Westgate Shopping centre in September Damage: Black smoke can be seen rising above Nairobi as the Westgate Mall was under seige 'There wasn't any screaming. Mr Walsh, 41, from north London, said: 'We were right up in the gods and a couple in the group below just said "Go!" He said people in the balcony filed out of the theatre calmly, but added: 'It was difficult - you could hardly see the seat in front of you, due to the dust.' Dee Kearney said: 'We were three or four seats from the stage when an actor turned around and said 'Watch out!' We initially thought it was part of the play. Then what we felt was debris falling on us, a loud bang, and then all of a sudden there was a coat of dust that came on us. She added: "It was a thick cloud of dust, so you couldn't actually tell what was happening. You knew it was coming from above but you didn't know what was actually happening.'