There are three main types of volcano-composite or strato, shield and dome. Composite Volcanoes. Composite volcanoes, sometimes known as strato volcanoes, are steep sided cones formed from layers of ash and [lava] flows. The eruptions from these volcanoes may be a pyroclastic flow rather than a flow of lava.
A vagal episode or vasovagal response or vasovagal attack (also called neurocardiogenic syncope) is a malaise mediated by the vagus nerve. When it leads to fainting, also known as a syncope, it is called a vasovagal syncope, which is the most common type of fainting.
Heightened emotions, such as panic or fright, including seeing blood, having blood drawn, or being fearful of your life, may cause a vasovagal attack. Straining to have a bowel movement can result in a vasovagal attack from stimulation of the vagus nerve, which lowers the heart rate in some people. Another cause of vasovagal attacks is the rapid pooling of blood to the leg muscles after running or other strenuous exercise.