Crossword puzzle clue "strain as your brain"

Strain, as your brain

Strain the brain

Course that requires no brain strain

Brain-to-brain phenomenon

Yell at your parents for not making the soup salty enough because your crush told you your mouth looks too funny to kiss, e.g.

Performed in a way that made your parents leave your school play in the middle of your solo :/

Penultimate word of the "This is your brain on drugs" ad

You might crack one with your brain