This is the biggest event of almost a week of 420 events at the Mousetrap. It kicks off with Altered Thurzdaze, featuring DJ Aphrodite. Friday features Giant Panda Guerilla Dub Squad. Saturday has a bunch of bands on the bill: Austin’s Psymbionic, The Twin Cats, Eumatik, Indigo Child and Nashawti, Megan Maudlin, Mikail Robertson, Magnetic, and more, all for $10. There’s more than one stage at this huge party, which kicks off at 7 p.m. Oh, but it’s not over. Sunday features Flatland Harmony Experiment’s bluegrass jam, and on Monday (the official 4/20, of course) Hyryder takes over everything for a huge party. You should basically just live at the Mousetrap this weekend.