A father and his son both appear briefly in Zombieland's title sequence.
When the zombie virus struck, the two were at a father and son picnic at a school (presumably the boy's) about to participate in a three-legged race. The plague infected several of the people at the event, who promptly turned on the humans and the duo found themselves under attack from their erstwhile friends. It is unknown if they escaped and survived, but given that both they and their attackers were tied together there is a slim chance they got away.
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