Climbing 'Mozek na citrón' (Brain on Lemon), graded a formidable 7+/8- at the Marvin climbing area, is an experience that truly lives up to its vivid name. This route isn't just about raw physical power; it's a profound mental puzzle that demands precision, balance, and unwavering resolve. The rock, often smooth and unforgiving, presents a series of intricate sequences: tiny crimps, delicate slab sections, and moments where you genuinely have to 'switch on your brain' to decipher the correct beta. Every hold feels meticulously placed, every move a deliberate step towards the anchors. The tension builds, the forearms scream, but the immense satisfaction of executing each challenging section cleanly is unparalleled. 'Mozek na citrón' stands as a classic test piece at Marvin, a route that challenges both the body and the mind, leaving you feeling invigorated, accomplished, and perhaps just a little bit zesty, much like a lemon.