Good catch......your comment made me take a look at it again. He states....."now we're in the school. An active shooter. Its not a drill....and... its currently...... its 2:52. I heard gun, (makes quick correction). I heard one gun shots (states plural after singular in regards to shots, thus doesn't make sense)....We thought it was a drill initially but its not".

A few seconds later he states "at around 2:30 we heard a gunshot (singular again) in my environmental science class, and we initially thought it was a drill, then we heard multiple (slight correction again), we heard more gunshots and then that was when we realized this is not a drill....this was life or death".

He then commences with the dropping of Cruz's name.

Note also that earlier in the video there is one witness talking to George Stephanopolous who states it sounded like a handgun or a shotgun.