Watch Out For Shaggy Goats

From Indonesia's simmering Mount Merapi:

The new dome has been forming on Merapi for more than a week, signalling that the eruption would involve an outflow of lava and deadly heat clouds rather than a massive explosion, scientists have said.

In its last large eruption in 1994, heat clouds known locally as "shaggy goats" careened down the volcano at more than 100 kilometres (60 miles) per hour, reaching temperatures of 600 degrees Celsius (1,100 degrees Fahrenheit).

The clouds killed 66 people.

Those goats are technically known as nuées ardentes.