Anonymous9: He's not having a heart attack. He's merely clutching his heart because he's so proud of his son. The strained expression is because he's also jizzing his pants.
Anonymous13: announcer: due to the effects of the deadly heart virus, goku had a heart attack. Seeking help he looked for chichi. If she has acted sooner, he would have been saved from irreversible damage that lead to his eventual death.
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Because Gohan just had to fuck his mother.
Good kid.
Goku: -walks in- honey we need to...OH GOD! chest..hurting..