"You swim like a buoy!" coach lady
(My favorite of them all)
"PENCILS DOOOWWWN!" professor (I'm sorry... but he wins
)
Kevin & Drew at hot dog stand in season 8 (Funny to watch them be calm while the family teams bicker)
Maōri aboriginals from season 13
(Not that memorable, but fun facial expressions)
Japanese game shows host from seasons 15 & 20 (Annoying, but very memorable)