The bolts holding the front plate of the stem to the stem body can be pulled out of the threads while the bike is being ridden, causing the rider to lose control of the bike and fall.
The table's metal top can contain lead and presents a risk of lead exposure to children. Lead is toxic if ingested and can cause adverse health effects.
The blade spindle shaft can break during lawn mowing and the broken blade pieces can become projectiles. This poses a risk of an impact injury to bystanders or damage to property.