  High cadence high spatial resolution observations in H-alpha with the Swedish
1-m Solar Telescope on La Palma have revealed the existence of small-scale
highly dynamic bright blobs. A fast wavelength tuning spectro-polarimeter
provides spectral information of these structures. The blobs slide along thin
magnetic threads at speeds in the range from 45 km/s to 111 km/s. The blobs
have a slight elongated shape and their lengths increase by a factor of 3 from
close to 1/2 arcsec when they first appear till they disappear 1-2 min later.
The brightest blobs show the highest speed. The widths of the H-alpha line
emission of the blobs correspond to non-thermal velocities in the plasma less
than 10 km/s which imply that they are not the result of shock driven heating.
The dynamic character of the bright blobs is similar to what can be expected
from an MHD fast mode pulse.
