Race conditions constitute a major vulnerability class affecting all types of concurrent software, with the Android kernel being no exception. In this presentation, after summarizing existing work, we will present 4 novel userland techniques for forcing the Android kernel to block, thus allowing an attacker to win race conditions more easily. The presented techniques can be used from the `untrusted_app`, as well as from the `system_server` and SELinux contexts, from where attackers usually execute further attacks (e.g. kernel LPEs). During the presentation, we will perform a deep technical review of Android internals and give live demonstrations of all the developed techniques. We will conclude with future work directions and open questions.