How to check for blown Or fired speaker?


I made a mistake which results in full power and volume output to the speaker.  My amp is a 75wpc, to a speaker with 86dB rated at 200w maximum.  The song I play is “You belong to me”

https://youtu.be/-9-JCmuq_qg

I immediately turn down the gain on my amp within 2s.  Is it possible to damage my speakers?  
I search on the internet and it says I need to check for distortion.  Are the distortion obvious?  Is it even possible that the damage is small and the distortion is hard to detect?  Or is it all or nothing kind of damage?
I did some tests, not playing music and increase the volume.  I can hear some hissing sound On the tweeter, and humming on the mid range and bass.  But those sound normal to me, not very loud, and same level on both sides.  However, I also don’t know how loud it was before. 
I then play some music, also didn’t realized any abnormalities.  There is no crackling or popping noise .... given all these, do you think the speakers are ok?  Any other test I should do?
gte357s
Yes your speakers are fine there is no audible damage and the incident lasted two seconds. If a driver was blown or damaged you would know.
@jond   thanks for the reply.  So, it sounds like if there is a damage, it would be something obvious to detect, am I correct?  
If there was no damage, still they were fired and may be able to collect unemployment. What state are you in?