<human>: This fuck up actually occurred on Friday. So I was shopping with my Mum in a pretty busy town centre. We had just bought a bag of chips and walked round a corner into a busy and *usually* quite noisy street. As we continued walking down the centre of the street, something didn't feel quite right and it was unusually *silent*. I looked around and noticed that people were eerily stood still and staring at us, as we were talking loud. I was just thinking wtf, and then said to my mum quite loudly: "Looks like they've just had their memory wiped by the Men In Black". We both laughed, however this seemed to attract more stern looks. Suddenly my Mum realised what was going on and told me. Soo embarrassed I walked **very** fast and quietly, trying my best to cause no further disrespect, into the closest shop and hid behind the door.
Turns out it was a minutes silence for the Tunisia attack victims.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Thought people taking part in a minutes silence had just had their memory wiped by the MIB and continued to be loud during it.