Nothing says 'I love you, dad' like throwing something at them when they least expect it.
Jimmy Kimmel continued his annual tradition of marking Father's Day by having kids surprise their fathers somehow and this year it was by screaming 'Catch!' at them before hurling whatever was in reach at them, all while someone else (presumably the mothers) recorded the whole thing.
It was fine for the dads who got teddy bears thrown at them, but not so fine for the ones who got a watermelon, ice or an entire cake in their faces.