Jeff needed two takes to get the table cloth pull right. It only took Matt one take to get it wrong.
While shooting the "Dry Ice Bomb" segment, nobody was expecting the glass in the water tank to shatter. That's why the crew seemed so amazed after the explosion, and why everyone rushed to secure the very expensive camera equipment.
The "Don't try this at home!" piece at the end of the episode was shot later in the season during the "Mountain Bikes" segment and shows most of the Time Warp production crew.
The girls seen at the end of the Bubbles segment were recruited outside the Time Warp Studio by a production assistant moments before that scene was shot. The director thought adding them to the shot would make it more beautiful.