IN exactly the same way as you note there is no magic and when I watch Dynamo [ a friend is a magician] I can explain his tricks- they are brilliantly executed for example
Takes the egg trick [ assuming we watched the same programme] then he had the 20 p in his hand and placed it on the egg just as he dripped it – you could see his finger go on the egg – notice how he chose the size of the coin – as it falls and breaks it will land in the egg.
The gate was good but he put his legs through first and then when he showed his legs by lifting the screen he had a fair degree of movement as he only needed to keep his hands still – still very skilled to have done this and it must have taken hours of practice
The broken glass would , I assume, have involved weighted or heavy cards – possibly wood – but he still required the skill to throw it accurately.