When Dutch teacher Debby Heerkens stood on a table and started to strip, her students may have been in a slight state of bewilderment.
Until, that is, the biology teacher revealed a spandex suit mapping out the human body in intricate detail.
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Heerkens was actually wearing several layers, including a skeletal bone structure suit and an outfit detailing internal organs.
"At first they were a little bit in shock because they thought 'the teacher is taking off her clothes,' until, they saw what was underneath," Heerkens told CNN.