All blockers are caused by some Impediments, but not all impediments are blockers.

Due to frequent context switching, the daily 15-minute touchpoints last an hour even/ day, reducing the team's time to finish activities for the demonstrations.

A developer is unable to work on their tasks within an iteration, because senior management is constantly pulling them into production incident analyses.

The development team needed to urgently set up all the test data the previous week; however, due to a glitch in the system this will not be available until before the demonstration.

The offshore testing team is pulled away at the last minute from a high-profile initiative and testing cannot be resumed until a new testing team is assigned.

Performance issues in the testing environment, leading to a 2-day delay in implementing the code.

The team has started working on the iteration, but the requirements artifacts are under review by the product owner.