From: Action Is Self-propelled Motion
-- 1 We hit a roadblock when we tried to repeat the experiment.
-- 2 We are at an impasse in this project.
-- 3 I've hit a brick wall in my analysis.
-- 4 We are going upstream--the administation is opposed to our actions.
-- 5 We are fighting an uphill battle--we'll never get this proposal approved.
-- 6 It's a steep road ahead for equal rights advocates.
-- 7 We have to get over/around this problem.
-- 8 We faced many hurdles in taking on this problem.
-- 9 When the going gets tough, the tough get going.