When we do applications in class it always seems to go on that person leaving their arm or arms out after the attack. Like they punch you block(there arm stays there)you strike,then grab there arm(which is supposed to still be extended)and strike to the body followed by a sweep. That was just one example. The end part of it relies on the arm still being out there but it seems that mose people recoil there arm or it is knocked away by the block.Are you supposed to do these techniques fast enough that they are stuned and leave that arm out there(basically they wont know what hit them if they expect to hit you)or are those applications pointless for a real fight?Maybe i'm asking too many questions considering i've only been in kung fu for almost 2 months and should just trust that it will all come together and make sense one day?Or is it a good idea to question?

What are your guys take on this?