Does everyone have a concert that just sticks out to them?

In 2008 I went to Projekt Revolution and saw Linkin Park. Their opening act for this tour was Chris Cornell. Being a massive LP and Soundgarden fan it was an unbelievable experience to see them both live. Chester and Chris both having passed away, this ticket is extra meaningful to me. PSA has a special this month on music stubs and I'll be getting this slabbed for my PC.

What concert do you remember the most and did you keep anything from it? Long live rock and roll!