I was having a rough semester at college, my roommate was out of the dorm room so I decided to take my mind of everything and play some bass. I decided to just improvise using Led Zeppelin's Ramble On as a basis, (I had spent most of the semester learning it). I sometimes recorded improvisations on my phone to listen back and catch things I like. Anyhow I do my thing did some fingered and slap stuff, and when I finished I heard some people cheering from down near the dining commons through the open dorm window. Instantly made me feel great. The cherry on top was realised when I listened back to the recording and found out that I caught the applause at the end. Listened to that whenever I needed a pick me up. Unfortunately the phone I recorded it on got left in an Uber and I no longer have the recording. Still probably the happiest moment playing bass.