Sometimes when 'exiting my body', I have a similar experience of drunkness...I'd say it's closer to being paralytic. It feels as if my legs have atrophied so much that I cannot stand, or that the force of gravity has increased by tens of factors.

The mistake:
Trying to force myself to a standing position, as if I'm battling some unknown entity - such behaviour inevitably wakes me up. Probably adrenalin.

Solution:
Don't move, and try to increase your awareness of the dream state. Acknowledge the surroundings. I can usually stand with ease after 30-40 seconds.

When I say 'exiting', I do mean a transition to the lucid state.