This tank imploded due to condensation of steam used during steam cleaning. Condensation creates large vacuum inside tank. External pressure of atmosphere of 14.7 PSI crushed this tank in a fraction of a second. Our body is used to this pressure. Pressure inside our lungs is also at 14.7PSI so our lungs stay in equilibrium. If we go in space without pressure suit, due to zero atmospheric pressure outside, our lungs will explode with internal pressure of 14.7 PSI.