One week after he plunged from an altitude of 128,100 feet 鈥 catapulting toward the earth, breaking the sound barrier along the way 鈥 Felix Baumgartner says it鈥檚 still difficult to fully understand the magnitude of his accomplishment.

鈥淲e did something that mattered to the world,鈥 Baumgartner told CTV鈥檚 Canada AM on Tuesday.

And the world had held its breath as the 43-year-old, seemingly without hesitation, leapt into the stratosphere on Oct. 14.

The Austrian daredevil said years of preparation 鈥 including wind-tunnel training, test jumps from 90,000 feet and a full dress rehearsal in a pressurized chamber 鈥 left him well prepared for the historic feat.

鈥淭here was not a single second to turn around and say 鈥業鈥檓 not going to do it,鈥欌 he said.

鈥淲hen you stand there on top of the world and you鈥檝e got this incredible view, it鈥檚 really overwhelming,鈥 Baumgartner explained. 鈥淏ut at the same time, you realize that everything around you is hostile.鈥

After disconnecting his oxygen line from the capsule, Baumgartner knew he had 10 minutes of oxygen left and little time to waste.

Reaching speeds of an estimated 1,342.8 kilometres per hour on his descent, Baumgartner became the first man to break the speed of sound in a record-shattering jump that marked both the highest and fastest free fall and the highest manned balloon flight. 

Still, the expert parachutist said he wouldn鈥檛 describe the experience as a pleasant one.

Pointing to the extreme altitude and the pressure of having the world watching his jump, Baumgartner said: 鈥淚t鈥檚 not easy; there鈥檚 no pleasure when you do it.鈥

But opening the parachute following a four-minute, 20-second free fall was a 鈥渂ig relief.鈥

鈥淚t was good to have solid ground underneath my feet,鈥 Baumgartner said. 鈥淚t鈥檚 almost too much, all the things you have to accomplish. I was the happiest person in the world.鈥

Baumgartner said he plans on retiring from the daredevil business and will now focus his career on flying helicopters.