No harm done... just banter really TBH.
What field of science are you in? I studied Astrophysics and Astronomy online for a while (Swinburne University Australia - not cheap but if ya into that stuff...bla bla bla) but the math side of things got too much for me unfortunately. Only wish I was smarter so I could have continued.
I taught Science here for 4 years and found that it's such an easy topic to grab kids attentions with. I remember wanting to hold a lesson dissecting frogs (as you do back home) and it turned out to be quite a story.
First... where to find frogs (live)? Went to the market and asked.. the next day they delivered a bag of twenty - Huge Fat Toads! Okay I can work with this I thought!
The next hurdle was the Chloroform. The students were supposed to adminster this themselves thus learning that a spot of Chloroform on a bit of cotton wool - will kill a toad

. So San Paulo called and said the little bottle of toxic substance (fortune that stuff costs!) was gonna be a week late.
No good I say as the lesson is tomorrow.
Dilemma. How to kill the toads? Another teacher suggested - '
Just freeze them' so I did.
On the operating table a couple of the buggers came back

. Heart beating, Lungs expanding. Of course I ensured the students that this was all normal and that I'd purposely done this to enable them to see both the circulatory system and respiratory system working in its full beauty.
Fortunately there were no squeumish participants and the rest of the 'show' went without glitch. The 'back from the dead' toads were discreetly removed from the room.
Science - you gotta love it!