After the milestone birthday of 21, it's pretty easy to forget your age as the years just tick away. Recently, when a son asked his elderly father how old he thought he was, he initially responded with the number 79. Boy, was he off by a lot.

When the man finally discovered he's 98 years old, he responded quite candidly.

"Your ass!" he said to his son. "I am not 98 years old. Holy fuck, how did I get so old so fast?"

In the clip, the man confirms he was born in 1919, so his summer birthday will put him at 99 later this year. At least this old man has a good attitude about the whole thing.