Effects of High Altitude

It amazes me that the effect the high altitude makes on sealed packages. When you look at the packages in the grocery store, they are all puffed up. I bought marshmallows and chips. The cleaning squirt bottles under the sink in the motor home were empty when we arrive at South Fork. The first time I opened my squeeze bottle of mayo, it exploded all over me and the kitchen. High altitude does strange things. I still am out of breath if I walk fast.