This is one of my favorite short sequences to help open up the heart and shoulders and add flexibility to the spine. I always drop onto the floor and do a few sets of this after traveling.
Start of in table top on your hands and knees. Do a few cat/cows, inhaling as you lift your tailbone and your chest and exhaling as you round your back, lifting up between your shoulder blades.
Then, keeping your hips directly over your knees, begin to sink your chest down towards the floor walking your hands away but keeping your arms straight. You might hover there, hanging your chest like a suspension bridge. If flexibility permits, you can rest your forehead or chest to the floor. Hold this for several breaths. Then, press into your hands engaging your core to rise back up. Finish with a child’s pose taking your big toes together and your knees apart. Bring your hips back towards your heels and rest your head to the floor.