Watch Free Online HD Moviesjoy. This vintage film discusses the importance of paying full attention when cooking with vegetable oils and shortening to prevent kitchen fires. It demonstrates through controlled experiments that oil and shortening can smoke and catch fire if left unattended over high heat, and emphasizes the need to reduce heat immediately if smoke is detected. The film highlights the basic safety guidelines for safe home frying, such as using a medium heat source and never leaving heating oil or shortening unattended.