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However, that stunned silence — at the New Zealand International Science Festival show in Dunedin on Saturday — was soon over.
"It went a bit bigger than I expected," he later said with a smile, saying he had been initially disoriented by the bigger-than-expected cloud.
"Explosions are really difficult to predict," he said.
For Mr Enriquez Ballestero, the Otago Museum science presentation co-ordinator, his presentation of the New Zealand International Science Festival’s first big show was a big personal milestone.
He worked closely with co-presenter Katherine Kennedy, whose stage name was Alice.
The show was another chance to show that science was fun, and something young people could do well.
Science also had a crucial role to play in helping solve problems, such as fighting the Covid-19 pandemic, and improving life on Earth.
He was grateful for all those who had come along to the more than hour-long show.
- Festival director Dan Hendra said the festival’s first day had been "great". It had featured the auditorium science show and a high-powered panel discussion on Covid-19, including Prof Michael Baker, of the University of Otago’s Wellington campus.
Hard work and a good team effort had been needed to bring together the 70-event festival, which runs until July 12, after the disruption caused by the coronavirus pandemic and lockdown.