Without breathing: 22 minutes.

The longest any human ever went without breathing took place in 2012, when Danish free diver Stig Severinsen held his breath underwater for 22 minutes.

Why you shouldn't try this at home: Without oxygen, the human brain will die after about four minutes. Severinsen cheated death by breathing in pure oxygen for about 19 minutes beforehand, which saturated his body so it could continue to keep his brain functioning while he was underwater.