I was stuck on several occasions long, long ago but fortunately was a pupil of the Tiger Moth Handswing Academy. First lesson was no need to swing too hard, just enough to take the blade through the impulse click, if it didn't click the coupling needed unstuck or otherwise remedied. Gipsy Major and Cirrus in Austers etc were easy enough but opposite rotation Lycoming and Continental were not, until I was advised to stand BEHIND the prop. This enables swinging with the right hand while the left steadies you against the cowling. Prime as usual, pull through four blades, then 'contact' and off she goes.