Totally forgot the blood drive was occurring and was bringing over some smoked meat to Prescott when Quaid got caught up in the, ahem, festivities.

He isn't a fan of needles and doesn't want to outwardly admit he's a grown ass man with such a childish aversion, so if someone were to railroad him with "hey are you here to give blood!?" he would swallow his fears and solemnly state yes. And then promptly almost faint, afterwards, because obviously still preferable to admitting you're icked out by needles.