It is a Facebook craze that has swept the globe, with people braving an ice bucket soaking to raise money for charity.
And while most people are content with a standard bucket of icy water, sisters Amy and Sophie Beresford, of Driffield, wanted to do something a little bigger.
The teenagers persuaded their dad, Patrick, to let them use the JCB and corn bucket on their farm.
It involved filling the bucket with about 1,000 litres of ice-cold water, which would then be poured onto them.
Amy, 13, said: We'd just seen it on Facebook and we just thought we'll see if we can better it.
"We looked around the farm for the biggest bucket we could find.
"It was a bit scary because we didn't know whether he'd let it go or not or whether he'd just dribble it, so it was good fun.
"We were very cold but there was a bit of adrenaline going."
After posting their video on Facebook, friends of the pair are now trying to beat it.
Amy said: "Some people are trying to outdo it and they can't, because it's a big bucket.
"Somebody tried with another tractor but the bucket wasn't as big as ours. We're still unbeaten at the moment."
Their father, Patrick, said it was a challenge he could not refuse.
He said: "The girls wanted to do the ice bucket challenge and the biggest we've got is actually the corn bucket on the JCB, so we filled it up full of water. It took about an hour and half and then I dunked it on them.
"It felt very satisfying. I'd heard about it, seen them on Facebook and on the television and thought, they're not very big buckets, I'm sure we can do better than that.
"I was well up for it – the idea of putting 1,000 litres of ice-cold water on my two teenage daughters.
"I understand it's gone almost viral. I'm very pleased for the girls because they're donating the proceeds to Macmillan."
Mr Beresford said he thinks it will be a challenge itself trying to beat the girls' attempt and said even sibling rivalry has set in, with his other two daughters, Molly and Lucy, who are triplets with Amy, now trying to find an even bigger challenge.
He said: "They are trying to come up with a bigger and bolder idea, but I think they're going to have to do that themselves because I can't think of anything else.
"We don't have a bigger bucket."
The ice bucket challenge swept the US as a way to raise money for motor neurone disease charities before crossing the Atlantic.
Among those who have taken part are Hull City manager Steve Bruce and players Allan McGregor and Sone Aluko.
Steve Bruce, who completed his challenge last week, nominated the club's vice-chairman Ehab Allam.
The Mail has launched a competition to find the best ice bucket challenge video from across Hull and East Yorkshire. The winner, who will be chosen by the editor, will receive £100 to be donated to a charity of their choice.
Email news@mailnewsmedia.co.uk with entries.
