The maps "glass2" and "tube1" each have a very large jump in which causes you to lag back whenever you attempt the jump, making it almost impossible to finish the course. Below, i have two screenshots on the laggy blocks that are making the maps almost unfinishable. Rarely, you will not lag on the course, in which makes glass2 possible, however the rest of tube1 is also pretty laggy, making that map crazy difficult. ^^ Jumping from the block i am standing on to the next block causes you to lag back, causing you to perform a small laggy hop, rather than a leap. The two blocks i am standing on also tend to cause you to lag, however this one is early on in the course. Please fix this, as glass and tube are my favorite maps in parkour, besides the run courses.