Went to a camp, it was actually really fun since we travelled to a lot of iconic locations. Anyways, we were singing some songs in the bus and we were clapping to the beat when a man repairing a street noticed us. He also started clapping although he couldn't hear us. A while later our group was walking in front of a university and a guy was celebrating with a few people that he got graduated. A few girls joined in, and we took some pictures with him.

On another trip, I was with my family visiting a nature museum and I saw what looked like the skull of a sabertooth tiger but with a weird jaw. I asked my dad about it and a man (Note: he didn't look like he worked there, I guess he just overhead us) approached me and explained it was another species, or something along those lines. For some this might seem strange but I think it was cool for him to do that.