"The impact was massive," she says.
"I was just a kid but the impact was massive in Croatia.
The potential impact, Kerslake said, is "massive".
The ecological impact of the project is massive: the Xingu River basin has four times more biodiversity than all of Europe.
A $25 million test of the election system is one thing, but when that test results in the election of both houses of parliament, the impact on Haitian democracy is massive.
The impact of being able to measure online ads' impact on offline sales like this is massive.
"I think that the impact is going to be massive and transformative," says Mr Wales, describing the importance of the MOOCs (massive open online courses) that have signed up millions of students.
What he's trying to achieve, he says, is "massive, outsize, discontinuous impact".
April Dobson, head of dementia innovation for Abbeyfield, which runs more than 500 care homes in the UK and hundreds more worldwide, says the impact of the VDT on care is "massive".
