Rules Analysis
It is the marker's responsibility to announce if play was affected for the purpose of the Continuation Rule (17.C). Generally speaking, due to 17.L, calls made by another player cannot be said to affect play. However, in limited situations for contested marking violation calls, when the marker diverts their attention away from marking while reasonably and quickly assessing the conditions to the thrower's marking violation call, the marker could determine that play was affected. For example, the thrower calls straddle, and while the marker is looking at their feet to assess their marking position, the thrower completes a throw around the marker. If the marker subsequently contests the straddle because they assessed that they weren't committing a marking violation, they could claim that play was affected and the disc should be returned to the thrower. It is the thrower's responsibility to stop play as soon as possible after the marker makes their call contesting the marking violation (20.F).
A player may bobble the disc in order to gain control of it, but purposeful bobbling (including tipping, delaying, guiding, brushing or the like) to oneself in order to advance the disc in any direction from where it initially was contacted is considered traveling.
After catching a pass, a player is required to come to a stop as quickly as possible and establish a pivot.
Tipping, brushing, etc. to someone else is legal. It is legal to tip/brush your own throw. However, if after a tip/brush, one is the first player to touch the disc, then it is deemed a tip/brush to oneself and it is a travel. Remember, you can bobble for the purpose of gaining control, so kicking the disc up to yourself to help catch it would be legal. But tipping the disc for the purpose of evading a defender would not be legal.
If a player catches the disc while running or jumping the player may release a pass without attempting to stop and without setting a pivot, provided that:
If offensive and defensive player catch the disc simultaneously, the offense retains possession.
If it is unclear whether a catch was made before the disc contacted the ground (grass is considered part of the ground), or whether a player's first point of ground contact after catching the disc was in- or out-of-bounds or in or out of the end zone, the player with the best perspective makes the call.