Avalanche surprises bystanders as they were watching
On Tuesday, April 10, 2018 around 4pm at the Glattier tunnel near Tignes in Savoie, an avalanche covered the road. A team went on site to clear the snow. Around 6pm, a second preventive avalanche was triggered (you can actually see the puff of smoke at the very beginning). But its magnitude surprised those present on site. In a few seconds It covered the tunnel and the road which had to be closed until midnight.
Sorry for vertical video (people in 2018 still don't get it)