Intercept and aerial refuel behind a TCAS traffic target.
Have a competition with your partner... who can start from a full stop, takeoff, execute a full 360 degree turn, and land again back to a full stop the quickest (Without crashing)? No other rules apply (like thrust limits or config changes). Personal best: 53 seconds in the Citation, 1:07 in the CRJ.
Fly a space shuttle approach profile to landing (requires T/R deployment in the CRJ. Amazingly it doesn't in the Citation!):