This is an awful choice of data for research, on ethical grounds alone. But as importantly the "danger" is manufactured: everyone can choose not to take part e

This is an awful choice of data for research, on ethical grounds alone. But as importantly the "danger" is manufactured: everyone can choose not to take part except the bulls. So they are all behaving the way they do due to exhilaration, not as a consequence of danger. Unless a bull gets lucky and disembowels one of the wretches.