Have you noticed a lot of people posting videos lately tagged with #IceBucketChallenge?
It's pretty much everywhere you look this summer.
The whole meme started with Boston native Peter Frates. Two years ago, he was diagnosed with ALS, or Lou Gehrig’s disease.
They based it on a game pro golfers were doing for charity and the two causes collided, then the #IceBucketChallenge became a huge thing.
Since then it's spun out to the whole internet, with people nominating 10 friends who then pass it on.
On Thursday, 200 people in Boston took it at once.
200 buckets of ice are waiting in Copley Square for the Boston #IceBucketChallenge. 1pm
A few days before that the Boston Police Department all accepted the challenge.
Great shot! @bostonpolice #IceBucketChallenge #strikeoutals for @PeteFrates3! @RachelOMcGuire @DeputyGross #wcvb
As well as the mayor of Boston, Marty Walsh.
It's still huge in Massachusetts, but thanks to huge chunks of Facebook tagging each other, it's now happening all over the country.
The way it connects with ALS research is that if you nominate someone and they don't accept the challenge they have to donate $100 to an ALS charity.
#UVa Tom O’Brien takes #IceBucketChallenge to honor former Eagles. @PeteFrates3 @BCSportsNews http://t.co/L0qa0G5ArM