[Oh, he more than trips. He falls right on his ass.
Eren blinks for a second, the shock on his face giving way to anger as he glares up from the floor.]
Provisions?! We can't waste time! They're under attack!
[He scrambles upright, grabs a chair, (wait, Eren, that's your weapon?) and makes another dash for the door.
How could Levi understand the wild panic seizing him? How could Levi know what 'hesitation' means to Eren? Hesitation brings death. Hesitation killed Eren's mother.