Around 254 students got together in a stadium in Portugal. They all stood in a line all around the stadium field, armed with a mattress each (behind them). The plan was to break the current Guinness World Record of the longest human domino chain of 100. Check the video -

It does look like a lot of fun, though I can imagine that the mattress might be hurt some, especially if the person in front is relatively heavy?

Though sometimes I feel that there are a lot of records that can be broken! Anyone want to break this one again?