Use Equal Part breath to quickly restore balance and a sense of being grounded.
Try with an equal part retention in between each breath for an increased sense of calm.
Sama Vritta Pranayama for Calm:
INhale through your nose for 4 seconds.
Hold for 4 seconds.
exhale out your nose for 4 seconds.
hold the bottom of the breath for 4 seconds.
Ideally go for 6 seconds for each part of breath.