Sneezes can travel up to 100 MPH (normally in the 30-50 MPH) range...
The average person sneezes 1196 times a year...
The average life expectancy is 77.9 years...we'll call it 78 for this thread...
Okay so lets do some math, 50 MPH (Average Sneeze) mulitplies by 1196 equals 59800...multiply that by how many years you live...78, and that equals just over 4.6 million...
So if you were to sneeze all of your sneezes out in one giant blow...you would be sneezing at 4.6 million MPH...and you would be dead...
/rant